diff --git a/generator/integration_tests/tests/golden_kitchen_sink_tracing_connection_test.cc b/generator/integration_tests/tests/golden_kitchen_sink_tracing_connection_test.cc
index dee9cb2a324a3..72646886eee35 100644
--- a/generator/integration_tests/tests/golden_kitchen_sink_tracing_connection_test.cc
+++ b/generator/integration_tests/tests/golden_kitchen_sink_tracing_connection_test.cc
@@ -32,7 +32,6 @@ using ::google::cloud::golden_v1_mocks::MockGoldenKitchenSinkConnection;
 using ::google::cloud::testing_util::StatusIs;
 using ::testing::Return;
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::DisableTracing;
 using ::google::cloud::testing_util::EnableTracing;
 using ::google::cloud::testing_util::InstallSpanCatcher;
@@ -376,20 +375,6 @@ TEST(MakeGoldenKitchenSinkTracingConnection, TracingDisabled) {
   EXPECT_THAT(spans, IsEmpty());
 }
 
-#else
-
-TEST(MakeGoldenKitchenSinkTracingConnection, NoOpenTelemetry) {
-  auto mock = std::make_shared<MockGoldenKitchenSinkConnection>();
-  EXPECT_CALL(*mock, DoNothing)
-      .WillOnce(Return(internal::AbortedError("fail")));
-
-  auto under_test = MakeGoldenKitchenSinkTracingConnection(mock);
-  auto result = under_test->DoNothing({});
-  EXPECT_THAT(result, StatusIs(StatusCode::kAborted));
-}
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 }  // namespace
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace golden_v1_internal
diff --git a/generator/integration_tests/tests/golden_kitchen_sink_tracing_stub_test.cc b/generator/integration_tests/tests/golden_kitchen_sink_tracing_stub_test.cc
index 306754d8db0f4..69e6bf36d0630 100644
--- a/generator/integration_tests/tests/golden_kitchen_sink_tracing_stub_test.cc
+++ b/generator/integration_tests/tests/golden_kitchen_sink_tracing_stub_test.cc
@@ -33,8 +33,6 @@ namespace {
 using ::google::cloud::testing_util::StatusIs;
 using ::testing::Return;
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 using ::google::cloud::testing_util::InstallSpanCatcher;
 using ::google::cloud::testing_util::OTelAttribute;
 using ::google::cloud::testing_util::OTelContextCaptured;
@@ -489,21 +487,6 @@ TEST(MakeGoldenKitchenSinkTracingStub, OpenTelemetry) {
   EXPECT_THAT(spans, Not(IsEmpty()));
 }
 
-#else
-
-TEST(MakeGoldenKitchenSinkTracingStub, NoOpenTelemetry) {
-  auto mock = std::make_shared<MockGoldenKitchenSinkStub>();
-  EXPECT_CALL(*mock, DoNothing)
-      .WillOnce(Return(internal::AbortedError("fail")));
-
-  auto under_test = MakeGoldenKitchenSinkTracingStub(mock);
-  grpc::ClientContext context;
-  auto result = under_test->DoNothing(context, Options{}, {});
-  EXPECT_THAT(result, StatusIs(StatusCode::kAborted));
-}
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 }  // namespace
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace golden_v1_internal
diff --git a/generator/integration_tests/tests/golden_thing_admin_connection_test.cc b/generator/integration_tests/tests/golden_thing_admin_connection_test.cc
index f4fd6b1c543cf..ef2d6171bd9a3 100644
--- a/generator/integration_tests/tests/golden_thing_admin_connection_test.cc
+++ b/generator/integration_tests/tests/golden_thing_admin_connection_test.cc
@@ -1617,7 +1617,6 @@ TEST(GoldenThingAdminConnectionTest, CheckExpectedOptions) {
               Contains(ContainsRegex("Unexpected option.+UnexpectedOption")));
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::DisableTracing;
 using ::google::cloud::testing_util::EnableTracing;
 using ::google::cloud::testing_util::SpanNamed;
@@ -1662,9 +1661,6 @@ TEST(GoldenThingAdminConnectionTest, TracingDisabled) {
               Not(Contains(SpanNamed(
                   "golden_v1::GoldenThingAdminConnection::DeleteBackup"))));
 }
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 }  // namespace
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace golden_v1
diff --git a/generator/integration_tests/tests/golden_thing_admin_rest_connection_test.cc b/generator/integration_tests/tests/golden_thing_admin_rest_connection_test.cc
index 3e148cc032271..721ff35c2e208 100644
--- a/generator/integration_tests/tests/golden_thing_admin_rest_connection_test.cc
+++ b/generator/integration_tests/tests/golden_thing_admin_rest_connection_test.cc
@@ -1678,7 +1678,6 @@ TEST(GoldenThingAdminConnectionTest, ConnectionCreatedWithOption) {
   EXPECT_THAT(conn->options().get<EndpointOption>(), Eq("foo"));
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::DisableTracing;
 using ::google::cloud::testing_util::EnableTracing;
 using ::google::cloud::testing_util::SpanNamed;
@@ -1723,8 +1722,6 @@ TEST(GoldenThingAdminConnectionTest, TracingDisabled) {
               Not(Contains(SpanNamed(
                   "golden_v1::GoldenThingAdminConnection::DeleteBackup"))));
 }
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 }  // namespace
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace golden_v1
diff --git a/generator/integration_tests/tests/golden_thing_admin_tracing_connection_test.cc b/generator/integration_tests/tests/golden_thing_admin_tracing_connection_test.cc
index 7e994c2abef99..348d7016d2761 100644
--- a/generator/integration_tests/tests/golden_thing_admin_tracing_connection_test.cc
+++ b/generator/integration_tests/tests/golden_thing_admin_tracing_connection_test.cc
@@ -32,7 +32,6 @@ using ::google::cloud::golden_v1_mocks::MockGoldenThingAdminConnection;
 using ::google::cloud::testing_util::StatusIs;
 using ::testing::Return;
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::DisableTracing;
 using ::google::cloud::testing_util::EnableTracing;
 using ::google::cloud::testing_util::InstallSpanCatcher;
@@ -702,20 +701,6 @@ TEST(MakeGoldenThingAdminTracingConnection, TracingDisabled) {
   EXPECT_THAT(spans, IsEmpty());
 }
 
-#else
-
-TEST(MakeGoldenThingAdminTracingConnection, NoOpenTelemetry) {
-  auto mock = std::make_shared<MockGoldenThingAdminConnection>();
-  EXPECT_CALL(*mock, DropDatabase)
-      .WillOnce(Return(internal::AbortedError("fail")));
-
-  auto under_test = MakeGoldenThingAdminTracingConnection(mock);
-  auto result = under_test->DropDatabase({});
-  EXPECT_THAT(result, StatusIs(StatusCode::kAborted));
-}
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 }  // namespace
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace golden_v1_internal
diff --git a/generator/integration_tests/tests/golden_thing_admin_tracing_stub_test.cc b/generator/integration_tests/tests/golden_thing_admin_tracing_stub_test.cc
index 8ca098fdea0a8..4c01aa06805c3 100644
--- a/generator/integration_tests/tests/golden_thing_admin_tracing_stub_test.cc
+++ b/generator/integration_tests/tests/golden_thing_admin_tracing_stub_test.cc
@@ -26,8 +26,6 @@ namespace golden_v1_internal {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN
 namespace {
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 using ::google::cloud::testing_util::InstallSpanCatcher;
 using ::google::cloud::testing_util::OTelAttribute;
 using ::google::cloud::testing_util::OTelContextCaptured;
@@ -698,24 +696,6 @@ TEST(MakeGoldenThingAdminTracingStub, OpenTelemetry) {
   EXPECT_THAT(spans, Not(IsEmpty()));
 }
 
-#else
-
-using ::google::cloud::testing_util::StatusIs;
-using ::testing::Return;
-
-TEST(MakeGoldenThingAdminTracingStub, NoOpenTelemetry) {
-  auto mock = std::make_shared<MockGoldenThingAdminStub>();
-  EXPECT_CALL(*mock, DropDatabase)
-      .WillOnce(Return(internal::AbortedError("fail")));
-
-  auto under_test = MakeGoldenThingAdminTracingStub(mock);
-  grpc::ClientContext context;
-  auto result = under_test->DropDatabase(context, Options{}, {});
-  EXPECT_THAT(result, StatusIs(StatusCode::kAborted));
-}
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 }  // namespace
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace golden_v1_internal
diff --git a/google/cloud/BUILD.bazel b/google/cloud/BUILD.bazel
index dd5358871e187..8ed27115adb70 100644
--- a/google/cloud/BUILD.bazel
+++ b/google/cloud/BUILD.bazel
@@ -54,10 +54,6 @@ cc_library(
     name = "google_cloud_cpp_common_private",
     srcs = google_cloud_cpp_common_srcs + ["internal/build_info.cc"],
     hdrs = google_cloud_cpp_common_hdrs,
-    defines = [
-        # Enable OpenTelemetry features in google-cloud-cpp
-        "GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY",
-    ],
     linkopts = select({
         "@platforms//os:windows": [
             "-DEFAULTLIB:bcrypt.lib",
diff --git a/google/cloud/bigtable/data_connection_test.cc b/google/cloud/bigtable/data_connection_test.cc
index 2a428214bca96..e51d7f38819e8 100644
--- a/google/cloud/bigtable/data_connection_test.cc
+++ b/google/cloud/bigtable/data_connection_test.cc
@@ -54,7 +54,6 @@ TEST(MakeDataConnection, DefaultsOptions) {
       << "User supplied Options are overridden in MakeDataConnection()";
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::DisableTracing;
 using ::google::cloud::testing_util::EnableTracing;
 using ::google::cloud::testing_util::SpanNamed;
@@ -81,7 +80,6 @@ TEST(MakeDataConnection, TracingDisabled) {
 
   EXPECT_THAT(span_catcher->GetSpans(), IsEmpty());
 }
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 }  // namespace
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
diff --git a/google/cloud/bigtable/internal/async_bulk_apply_test.cc b/google/cloud/bigtable/internal/async_bulk_apply_test.cc
index d8304717c466b..930eed5281915 100644
--- a/google/cloud/bigtable/internal/async_bulk_apply_test.cc
+++ b/google/cloud/bigtable/internal/async_bulk_apply_test.cc
@@ -1119,7 +1119,6 @@ TEST_F(AsyncBulkApplyTest, BigtableCookie) {
   CheckFailedMutations(actual.get(), expected);
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::EnableTracing;
 using ::google::cloud::testing_util::IsActive;
 using ::google::cloud::testing_util::SpanNamed;
@@ -1191,7 +1190,6 @@ TEST_F(AsyncBulkApplyTest, CallSpanActiveThroughout) {
   auto overlay = opentelemetry::trace::Scope(internal::MakeSpan("overlay"));
   (void)f.get();
 }
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 }  // namespace
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
diff --git a/google/cloud/bigtable/internal/async_row_reader_test.cc b/google/cloud/bigtable/internal/async_row_reader_test.cc
index 41dfec788c604..b742726626875 100644
--- a/google/cloud/bigtable/internal/async_row_reader_test.cc
+++ b/google/cloud/bigtable/internal/async_row_reader_test.cc
@@ -1733,7 +1733,6 @@ TEST_F(AsyncRowReaderTest, BigtableCookie) {
                          std::make_shared<OperationContext>());
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::EnableTracing;
 using ::google::cloud::testing_util::IsActive;
 using ::google::cloud::testing_util::SpanNamed;
@@ -1811,7 +1810,6 @@ TEST_F(AsyncRowReaderTest, CallSpanActiveThroughout) {
   // Block until the async call has completed.
   p.get_future().get();
 }
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 }  // namespace
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace bigtable_internal
diff --git a/google/cloud/bigtable/internal/async_row_sampler_test.cc b/google/cloud/bigtable/internal/async_row_sampler_test.cc
index 5a88ade0c8f84..8593f32811c88 100644
--- a/google/cloud/bigtable/internal/async_row_sampler_test.cc
+++ b/google/cloud/bigtable/internal/async_row_sampler_test.cc
@@ -772,7 +772,6 @@ TEST_F(AsyncSampleRowKeysTest, BigtableCookie) {
   EXPECT_THAT(sor, StatusIs(StatusCode::kPermissionDenied, HasSubstr("fail")));
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::EnableTracing;
 using ::google::cloud::testing_util::IsActive;
 using ::google::cloud::testing_util::SpanNamed;
@@ -838,7 +837,6 @@ TEST_F(AsyncSampleRowKeysTest, CallSpanActiveThroughout) {
   auto overlay = opentelemetry::trace::Scope(internal::MakeSpan("overlay"));
   (void)f.get();
 }
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 }  // namespace
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
diff --git a/google/cloud/bigtable/internal/bigtable_stub_factory_test.cc b/google/cloud/bigtable/internal/bigtable_stub_factory_test.cc
index d7b07d00cc171..a94e233fd2928 100644
--- a/google/cloud/bigtable/internal/bigtable_stub_factory_test.cc
+++ b/google/cloud/bigtable/internal/bigtable_stub_factory_test.cc
@@ -264,7 +264,6 @@ TEST(BigtableStubFactory, FeaturesFlags) {
   (void)stub->MutateRow(context, Options{}, {});
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::DisableTracing;
 using ::google::cloud::testing_util::EnableTracing;
 using ::google::cloud::testing_util::SpanNamed;
@@ -335,7 +334,6 @@ TEST(BigtableStubFactory, TracingDisabled) {
 
   EXPECT_THAT(span_catcher->GetSpans(), IsEmpty());
 }
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 }  // namespace
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
diff --git a/google/cloud/bigtable/internal/data_tracing_connection.cc b/google/cloud/bigtable/internal/data_tracing_connection.cc
index e7c4942135b62..d97f825eb4fde 100644
--- a/google/cloud/bigtable/internal/data_tracing_connection.cc
+++ b/google/cloud/bigtable/internal/data_tracing_connection.cc
@@ -21,7 +21,6 @@ namespace cloud {
 namespace bigtable_internal {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 namespace {
 
 std::vector<bigtable::FailedMutation> EndBulkApplySpan(
@@ -215,15 +214,6 @@ std::shared_ptr<bigtable::DataConnection> MakeDataTracingConnection(
   return std::make_shared<DataTracingConnection>(std::move(conn));
 }
 
-#else
-
-std::shared_ptr<bigtable::DataConnection> MakeDataTracingConnection(
-    std::shared_ptr<bigtable::DataConnection> conn) {
-  return conn;
-}
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace bigtable_internal
 }  // namespace cloud
diff --git a/google/cloud/bigtable/internal/data_tracing_connection_test.cc b/google/cloud/bigtable/internal/data_tracing_connection_test.cc
index 5e9fadf777fc6..d60ef219b1a07 100644
--- a/google/cloud/bigtable/internal/data_tracing_connection_test.cc
+++ b/google/cloud/bigtable/internal/data_tracing_connection_test.cc
@@ -26,7 +26,6 @@ namespace bigtable_internal {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN
 namespace {
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::bigtable_mocks::MockDataConnection;
 using ::google::cloud::testing_util::InstallSpanCatcher;
 using ::google::cloud::testing_util::IsOkAndHolds;
@@ -641,7 +640,6 @@ TEST(DataTracingConnection, AsyncReadRowFailure) {
           Not(SpanHasAttributes(
               OTelAttribute<bool>("gcloud.bigtable.row_found", _))))));
 }
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 }  // namespace
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
diff --git a/google/cloud/bigtable/internal/mutate_rows_limiter_test.cc b/google/cloud/bigtable/internal/mutate_rows_limiter_test.cc
index c8636759728fd..d392d00c3ef73 100644
--- a/google/cloud/bigtable/internal/mutate_rows_limiter_test.cc
+++ b/google/cloud/bigtable/internal/mutate_rows_limiter_test.cc
@@ -278,7 +278,6 @@ TEST(MakeMutateRowsLimiter, LoggingDisabled) {
   }
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::DisableTracing;
 using ::google::cloud::testing_util::EnableTracing;
 using ::google::cloud::testing_util::MockCompletionQueueImpl;
@@ -353,7 +352,6 @@ TEST(MakeMutateRowsLimiter, TracingDisabledAsync) {
     EXPECT_THAT(span_catcher->GetSpans(), IsEmpty());
   }
 }
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 }  // namespace
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
diff --git a/google/cloud/bigtable/internal/traced_row_reader.cc b/google/cloud/bigtable/internal/traced_row_reader.cc
index 55397c63f17ff..07fbeb8b59929 100644
--- a/google/cloud/bigtable/internal/traced_row_reader.cc
+++ b/google/cloud/bigtable/internal/traced_row_reader.cc
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/bigtable/internal/traced_row_reader.h"
 #include "google/cloud/internal/opentelemetry.h"
 
@@ -72,4 +71,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace bigtable_internal
 }  // namespace cloud
 }  // namespace google
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/bigtable/internal/traced_row_reader.h b/google/cloud/bigtable/internal/traced_row_reader.h
index a423214d6dd7e..c7221b3a46ca6 100644
--- a/google/cloud/bigtable/internal/traced_row_reader.h
+++ b/google/cloud/bigtable/internal/traced_row_reader.h
@@ -15,7 +15,6 @@
 #ifndef GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_BIGTABLE_INTERNAL_TRACED_ROW_READER_H
 #define GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_BIGTABLE_INTERNAL_TRACED_ROW_READER_H
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/bigtable/row_reader.h"
 
 namespace google {
@@ -36,6 +35,5 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace bigtable_internal
 }  // namespace cloud
 }  // namespace google
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 #endif  // GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_BIGTABLE_INTERNAL_TRACED_ROW_READER_H
diff --git a/google/cloud/bigtable/internal/traced_row_reader_test.cc b/google/cloud/bigtable/internal/traced_row_reader_test.cc
index cad809b81496e..a10093febf9f0 100644
--- a/google/cloud/bigtable/internal/traced_row_reader_test.cc
+++ b/google/cloud/bigtable/internal/traced_row_reader_test.cc
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/bigtable/internal/traced_row_reader.h"
 #include "google/cloud/bigtable/mocks/mock_row_reader.h"
 #include "google/cloud/internal/make_status.h"
@@ -151,4 +150,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace bigtable_internal
 }  // namespace cloud
 }  // namespace google
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/bigtable/row_reader_test.cc b/google/cloud/bigtable/row_reader_test.cc
index b11f897d62362..1ab61568e94c3 100644
--- a/google/cloud/bigtable/row_reader_test.cc
+++ b/google/cloud/bigtable/row_reader_test.cc
@@ -90,7 +90,6 @@ TEST(RowReaderTest, OptionsSpan) {
   }
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::IsActive;
 
 TEST(RowReader, CallSpanActiveThroughout) {
@@ -121,7 +120,6 @@ TEST(RowReader, CallSpanActiveThroughout) {
     EXPECT_STATUS_OK(row);
   }
 }
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 }  // anonymous namespace
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
diff --git a/google/cloud/google_cloud_cpp_common.cmake b/google/cloud/google_cloud_cpp_common.cmake
index 773857ef720d1..8e067558e8fb5 100644
--- a/google/cloud/google_cloud_cpp_common.cmake
+++ b/google/cloud/google_cloud_cpp_common.cmake
@@ -202,10 +202,6 @@ if (opentelemetry IN_LIST GOOGLE_CLOUD_CPP_ENABLE)
     if (opentelemetry-cpp_FOUND)
         target_link_libraries(google_cloud_cpp_common
                               PUBLIC opentelemetry-cpp::api)
-        target_compile_definitions(
-            google_cloud_cpp_common
-            PUBLIC # Enable OpenTelemetry features in google-cloud-cpp
-                   GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY)
         set(GOOGLE_CLOUD_CPP_FIND_OPTIONAL_DEPENDENCIES
             "find_dependency(opentelemetry-cpp)")
         set(GOOGLE_CLOUD_CPP_OPENTELEMETRY_API "opentelemetry_api")
diff --git a/google/cloud/internal/async_connection_ready_test.cc b/google/cloud/internal/async_connection_ready_test.cc
index fbf6feca8ba59..6dfe8a528bd26 100644
--- a/google/cloud/internal/async_connection_ready_test.cc
+++ b/google/cloud/internal/async_connection_ready_test.cc
@@ -100,8 +100,6 @@ TEST(CompletionQueueTest, SuccessfulWaitingForConnection) {
   cli_thread.join();
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 TEST(CompletionQueueTest, PropagateCallContext) {
   auto span_catcher = testing_util::InstallSpanCatcher();
 
@@ -137,8 +135,6 @@ TEST(CompletionQueueTest, PropagateCallContext) {
   t.join();
 }
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 }  // namespace
 }  // namespace internal
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
diff --git a/google/cloud/internal/async_polling_loop_test.cc b/google/cloud/internal/async_polling_loop_test.cc
index 0de2fb563dde3..2ca520c9efb99 100644
--- a/google/cloud/internal/async_polling_loop_test.cc
+++ b/google/cloud/internal/async_polling_loop_test.cc
@@ -642,7 +642,6 @@ TEST(AsyncPollingLoopTest, ConfigurePollContext) {
                                      HasSubstr("operation cancelled"))));
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::EnableTracing;
 using ::google::cloud::testing_util::IsActive;
 using ::google::cloud::testing_util::OTelAttribute;
@@ -773,8 +772,6 @@ TEST(AsyncPollingLoopTest, TraceCapturesOperationName) {
                                     "gl-cpp.LRO_name", "test-op-name")))));
 }
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 }  // namespace
 }  // namespace internal
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
diff --git a/google/cloud/internal/async_read_write_stream_impl_test.cc b/google/cloud/internal/async_read_write_stream_impl_test.cc
index f35ddf4925594..908e85294a8a5 100644
--- a/google/cloud/internal/async_read_write_stream_impl_test.cc
+++ b/google/cloud/internal/async_read_write_stream_impl_test.cc
@@ -215,8 +215,6 @@ TEST(AsyncReadWriteStreamingRpcTest, Error) {
   EXPECT_THAT(metadata.trailers, IsEmpty());
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 using ::google::cloud::testing_util::IsActive;
 
 TEST(AsyncReadWriteStreamingRpcTest, SpanActiveAcrossAsyncGrpcOperations) {
@@ -330,8 +328,6 @@ TEST(AsyncReadWriteStreamingRpcTest, SpanActiveAcrossAsyncGrpcOperations) {
   (void)finish.get();
 }
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 }  // namespace
 }  // namespace internal
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
diff --git a/google/cloud/internal/async_read_write_stream_tracing.h b/google/cloud/internal/async_read_write_stream_tracing.h
index 8d6be0a09541d..707daa4962fc5 100644
--- a/google/cloud/internal/async_read_write_stream_tracing.h
+++ b/google/cloud/internal/async_read_write_stream_tracing.h
@@ -15,7 +15,6 @@
 #ifndef GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_ASYNC_READ_WRITE_STREAM_TRACING_H
 #define GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_ASYNC_READ_WRITE_STREAM_TRACING_H
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/internal/async_read_write_stream_impl.h"
 #include "google/cloud/internal/grpc_opentelemetry.h"
 #include "google/cloud/version.h"
@@ -132,6 +131,5 @@ class AsyncStreamingReadWriteRpcTracing
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace cloud
 }  // namespace google
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 #endif  // GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_ASYNC_READ_WRITE_STREAM_TRACING_H
diff --git a/google/cloud/internal/async_read_write_stream_tracing_test.cc b/google/cloud/internal/async_read_write_stream_tracing_test.cc
index 8476e4b649fa4..3ea59eab6990d 100644
--- a/google/cloud/internal/async_read_write_stream_tracing_test.cc
+++ b/google/cloud/internal/async_read_write_stream_tracing_test.cc
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/internal/async_read_write_stream_tracing.h"
 #include "google/cloud/mocks/mock_async_streaming_read_write_rpc.h"
 #include "google/cloud/internal/make_status.h"
@@ -390,4 +389,3 @@ TEST(AsyncStreamingReadWriteRpcTracing, StartedStreamShouldExtractMetadata) {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace cloud
 }  // namespace google
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/internal/async_rest_polling_loop_test.cc b/google/cloud/internal/async_rest_polling_loop_test.cc
index faba03fa52b19..b382b427bf8be 100644
--- a/google/cloud/internal/async_rest_polling_loop_test.cc
+++ b/google/cloud/internal/async_rest_polling_loop_test.cc
@@ -588,7 +588,6 @@ TEST(AsyncRestPollingLoopTest, PollThenCancelDuringPoll) {
                                      HasSubstr("operation cancelled"))));
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::EnableTracing;
 using ::google::cloud::testing_util::IsActive;
 using ::google::cloud::testing_util::OTelAttribute;
@@ -724,8 +723,6 @@ TEST(AsyncRestPollingLoopTest, TraceCapturesOperationName) {
                                     "gl-cpp.LRO_name", "test-op-name")))));
 }
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 }  // namespace
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace rest_internal
diff --git a/google/cloud/internal/async_rest_retry_loop_test.cc b/google/cloud/internal/async_rest_retry_loop_test.cc
index 1fa7e50cae506..092daf90b63e6 100644
--- a/google/cloud/internal/async_rest_retry_loop_test.cc
+++ b/google/cloud/internal/async_rest_retry_loop_test.cc
@@ -559,7 +559,6 @@ TEST_F(AsyncRestRetryLoopCancelTest, ShutdownDuringTimer) {
               Contains(Pair("gcloud-cpp.retry.function", "test-location")));
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::EnableTracing;
 using ::google::cloud::testing_util::IsActive;
 using ::google::cloud::testing_util::SpanNamed;
@@ -615,8 +614,6 @@ TEST(AsyncRestRetryLoopTest, CallSpanActiveDuringCancel) {
   (void)actual.get();
 }
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 }  // namespace
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace rest_internal
diff --git a/google/cloud/internal/async_retry_loop_test.cc b/google/cloud/internal/async_retry_loop_test.cc
index 679c06f5da4e4..7e200d4eec613 100644
--- a/google/cloud/internal/async_retry_loop_test.cc
+++ b/google/cloud/internal/async_retry_loop_test.cc
@@ -604,7 +604,6 @@ TEST_F(AsyncRetryLoopCancelTest, ShutdownDuringTimer) {
               Contains(Pair("gcloud-cpp.retry.function", "test-location")));
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::EnableTracing;
 using ::google::cloud::testing_util::IsActive;
 using ::google::cloud::testing_util::SpanNamed;
@@ -658,8 +657,6 @@ TEST(AsyncRetryLoopTest, CallSpanActiveDuringCancel) {
   (void)actual.get();
 }
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 }  // namespace
 }  // namespace internal
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
diff --git a/google/cloud/internal/async_streaming_read_rpc_impl_test.cc b/google/cloud/internal/async_streaming_read_rpc_impl_test.cc
index 31ec5c6eb3309..e8a1fbfaede47 100644
--- a/google/cloud/internal/async_streaming_read_rpc_impl_test.cc
+++ b/google/cloud/internal/async_streaming_read_rpc_impl_test.cc
@@ -172,8 +172,6 @@ TEST(AsyncStreamingReadRpcTest, Error) {
             stream.Finish().get());
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 using ::google::cloud::testing_util::IsActive;
 
 TEST(AsyncStreamingReadRpcTest, SpanActiveAcrossAsyncGrpcOperations) {
@@ -262,8 +260,6 @@ TEST(AsyncStreamingReadRpcTest, SpanActiveAcrossAsyncGrpcOperations) {
   (void)finish.get();
 }
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 }  // namespace
 }  // namespace internal
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
diff --git a/google/cloud/internal/async_streaming_read_rpc_tracing.h b/google/cloud/internal/async_streaming_read_rpc_tracing.h
index 71e77f2d02732..2099531b2754d 100644
--- a/google/cloud/internal/async_streaming_read_rpc_tracing.h
+++ b/google/cloud/internal/async_streaming_read_rpc_tracing.h
@@ -15,7 +15,6 @@
 #ifndef GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_ASYNC_STREAMING_READ_RPC_TRACING_H
 #define GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_ASYNC_STREAMING_READ_RPC_TRACING_H
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/internal/async_streaming_read_rpc.h"
 #include "google/cloud/internal/grpc_opentelemetry.h"
 #include "google/cloud/version.h"
@@ -108,6 +107,5 @@ class AsyncStreamingReadRpcTracing : public AsyncStreamingReadRpc<Response> {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace cloud
 }  // namespace google
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 #endif  // GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_ASYNC_STREAMING_READ_RPC_TRACING_H
diff --git a/google/cloud/internal/async_streaming_read_rpc_tracing_test.cc b/google/cloud/internal/async_streaming_read_rpc_tracing_test.cc
index 8879d4882af90..52113a5ccb225 100644
--- a/google/cloud/internal/async_streaming_read_rpc_tracing_test.cc
+++ b/google/cloud/internal/async_streaming_read_rpc_tracing_test.cc
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/internal/async_streaming_read_rpc_tracing.h"
 #include "google/cloud/internal/make_status.h"
 #include "google/cloud/internal/opentelemetry.h"
@@ -266,4 +265,3 @@ TEST(AsyncStreamingReadRpcTracing, StartedStreamShouldExtractMetadata) {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace cloud
 }  // namespace google
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/internal/async_streaming_write_rpc_impl_test.cc b/google/cloud/internal/async_streaming_write_rpc_impl_test.cc
index 235a2939c22b9..b065dec84d8bf 100644
--- a/google/cloud/internal/async_streaming_write_rpc_impl_test.cc
+++ b/google/cloud/internal/async_streaming_write_rpc_impl_test.cc
@@ -184,8 +184,6 @@ TEST(AsyncStreamingWriteRpcTest, Error) {
             stream.Finish().get().status());
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 using ::google::cloud::testing_util::IsActive;
 
 TEST(AsyncStreamingWriteRpcTest, SpanActiveAcrossAsyncGrpcOperations) {
@@ -287,8 +285,6 @@ TEST(AsyncStreamingWriteRpcTest, SpanActiveAcrossAsyncGrpcOperations) {
   (void)finish.get();
 }
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 }  // namespace
 }  // namespace internal
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
diff --git a/google/cloud/internal/async_streaming_write_rpc_tracing.h b/google/cloud/internal/async_streaming_write_rpc_tracing.h
index e962f7ac95c41..de64ccc9306e0 100644
--- a/google/cloud/internal/async_streaming_write_rpc_tracing.h
+++ b/google/cloud/internal/async_streaming_write_rpc_tracing.h
@@ -15,7 +15,6 @@
 #ifndef GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_ASYNC_STREAMING_WRITE_RPC_TRACING_H
 #define GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_ASYNC_STREAMING_WRITE_RPC_TRACING_H
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/internal/async_streaming_write_rpc.h"
 #include "google/cloud/internal/grpc_opentelemetry.h"
 #include "google/cloud/version.h"
@@ -122,6 +121,5 @@ class AsyncStreamingWriteRpcTracing
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace cloud
 }  // namespace google
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 #endif  // GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_ASYNC_STREAMING_WRITE_RPC_TRACING_H
diff --git a/google/cloud/internal/async_streaming_write_rpc_tracing_test.cc b/google/cloud/internal/async_streaming_write_rpc_tracing_test.cc
index f7906db2982c5..960c0affac56c 100644
--- a/google/cloud/internal/async_streaming_write_rpc_tracing_test.cc
+++ b/google/cloud/internal/async_streaming_write_rpc_tracing_test.cc
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/internal/async_streaming_write_rpc_tracing.h"
 #include "google/cloud/internal/make_status.h"
 #include "google/cloud/internal/opentelemetry.h"
@@ -293,4 +292,3 @@ TEST(AsyncStreamingWriteRpcTracing, StartedStreamShouldExtractMetadata) {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace cloud
 }  // namespace google
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/internal/call_context.h b/google/cloud/internal/call_context.h
index eb6575f0aab47..0134614de518e 100644
--- a/google/cloud/internal/call_context.h
+++ b/google/cloud/internal/call_context.h
@@ -18,11 +18,9 @@
 #include "google/cloud/internal/opentelemetry_context.h"
 #include "google/cloud/options.h"
 #include "google/cloud/version.h"
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include <opentelemetry/trace/scope.h>
 #include <opentelemetry/trace/span.h>
 #include <opentelemetry/trace/tracer.h>
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include <chrono>
 #include <functional>
 
@@ -44,9 +42,7 @@ struct CallContext {
   CallContext() : CallContext(SaveCurrentOptions()) {}
 
   ImmutableOptions options;
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
   OTelContext otel_context = CurrentOTelContext();
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 };
 
 /**
@@ -58,13 +54,10 @@ class ScopedCallContext {
  public:
   explicit ScopedCallContext(CallContext call_context)
       : options_span_(std::move(call_context.options))
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
         // clang-format off
         , scoped_otel_context_(std::move(call_context.otel_context))
   // clang-format on
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-  {
-  }
+  {}
 
   // `ScopedCallContext` should not be copied/moved.
   ScopedCallContext(ScopedCallContext const&) = delete;
@@ -78,9 +71,7 @@ class ScopedCallContext {
 
  private:
   OptionsSpan options_span_;
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
   ScopedOTelContext scoped_otel_context_;
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 };
 
 }  // namespace internal
diff --git a/google/cloud/internal/call_context_test.cc b/google/cloud/internal/call_context_test.cc
index 79e1c2c2c74fb..d05231e8ce817 100644
--- a/google/cloud/internal/call_context_test.cc
+++ b/google/cloud/internal/call_context_test.cc
@@ -44,7 +44,6 @@ TEST(CallContext, Options) {
   EXPECT_FALSE(CallContext().options->has<IntOption>());
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::testing::ElementsAre;
 using ::testing::IsEmpty;
 
@@ -67,8 +66,6 @@ TEST(CallContext, OTel) {
   EXPECT_THAT(CallContext().otel_context, IsEmpty());
 }
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 }  // namespace
 }  // namespace internal
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
diff --git a/google/cloud/internal/grpc_opentelemetry.cc b/google/cloud/internal/grpc_opentelemetry.cc
index 127e71dbf5317..ab05520280fee 100644
--- a/google/cloud/internal/grpc_opentelemetry.cc
+++ b/google/cloud/internal/grpc_opentelemetry.cc
@@ -22,22 +22,18 @@
 #include "google/cloud/options.h"
 #include "absl/strings/match.h"
 #include <grpcpp/grpcpp.h>
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include <opentelemetry/context/propagation/global_propagator.h>
 #include <opentelemetry/context/propagation/text_map_propagator.h>
 #include <opentelemetry/semconv/incubating/rpc_attributes.h>
 #include <opentelemetry/semconv/network_attributes.h>
 #include <opentelemetry/trace/span_metadata.h>
 #include <opentelemetry/trace/span_startoptions.h>
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 namespace google {
 namespace cloud {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN
 namespace internal {
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 namespace {
 
 /**
@@ -166,7 +162,6 @@ future<Status> EndSpan(
     return EndSpan(*s, std::move(t));
   });
 }
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 }  // namespace internal
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
diff --git a/google/cloud/internal/grpc_opentelemetry.h b/google/cloud/internal/grpc_opentelemetry.h
index 500e3c67c363f..9ea8bc86a80e2 100644
--- a/google/cloud/internal/grpc_opentelemetry.h
+++ b/google/cloud/internal/grpc_opentelemetry.h
@@ -22,10 +22,8 @@
 #include "google/cloud/options.h"
 #include "google/cloud/version.h"
 #include <grpcpp/grpcpp.h>
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include <opentelemetry/nostd/shared_ptr.h>
 #include <opentelemetry/trace/span.h>
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include <chrono>
 #include <functional>
 
@@ -34,8 +32,6 @@ namespace cloud {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN
 namespace internal {
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 /**
  * Make a span, setting attributes related to gRPC.
  *
@@ -112,8 +108,6 @@ future<StatusOr<T>> EndSpan(
   });
 }
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 /**
  * Returns a traced timer, if OpenTelemetry tracing is enabled.
  */
@@ -121,14 +115,12 @@ template <typename Rep, typename Period>
 future<StatusOr<std::chrono::system_clock::time_point>> TracedAsyncBackoff(
     CompletionQueue& cq, Options const& options,
     std::chrono::duration<Rep, Period> duration, std::string const& name) {
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
   if (TracingEnabled(options)) {
     auto span = MakeSpan(name);
     OTelScope scope(span);
     auto timer = cq.MakeRelativeTimer(duration);
     return EndSpan(std::move(span), std::move(timer));
   }
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
   (void)options;
   (void)name;
   return cq.MakeRelativeTimer(duration);
diff --git a/google/cloud/internal/grpc_opentelemetry_test.cc b/google/cloud/internal/grpc_opentelemetry_test.cc
index b6484f2f504c3..2ad4667b69d0a 100644
--- a/google/cloud/internal/grpc_opentelemetry_test.cc
+++ b/google/cloud/internal/grpc_opentelemetry_test.cc
@@ -22,11 +22,9 @@
 #include "google/cloud/testing_util/validate_propagator.h"
 #include <gmock/gmock.h>
 #include <grpcpp/grpcpp.h>
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include <opentelemetry/context/propagation/global_propagator.h>
 #include <opentelemetry/semconv/incubating/rpc_attributes.h>
 #include <opentelemetry/semconv/network_attributes.h>
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 namespace google {
 namespace cloud {
@@ -37,7 +35,6 @@ namespace {
 using ::testing::ByMove;
 using ::testing::Return;
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::DisableTracing;
 using ::google::cloud::testing_util::EnableTracing;
 using ::google::cloud::testing_util::InstallSpanCatcher;
@@ -322,22 +319,6 @@ TEST(OpenTelemetry, TracedAsyncBackoffPreservesContext) {
                   SpanNamed("parent")));
 }
 
-#else
-
-TEST(NoOpenTelemetry, TracedAsyncBackoff) {
-  auto const duration = std::chrono::nanoseconds(100);
-  auto mock_cq = std::make_shared<testing_util::MockCompletionQueueImpl>();
-  EXPECT_CALL(*mock_cq, MakeRelativeTimer(duration))
-      .WillOnce(Return(ByMove(make_ready_future(
-          make_status_or(std::chrono::system_clock::now())))));
-  CompletionQueue cq(mock_cq);
-
-  auto f = TracedAsyncBackoff(cq, Options{}, duration, "Async Backoff");
-  EXPECT_STATUS_OK(f.get());
-}
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 }  // namespace
 }  // namespace internal
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
diff --git a/google/cloud/internal/minimal_iam_credentials_stub.cc b/google/cloud/internal/minimal_iam_credentials_stub.cc
index f9b67b4c17f22..265e2711eda9b 100644
--- a/google/cloud/internal/minimal_iam_credentials_stub.cc
+++ b/google/cloud/internal/minimal_iam_credentials_stub.cc
@@ -161,7 +161,6 @@ class AsyncAccessTokenGeneratorLogging : public MinimalIamCredentialsStub {
   TracingOptions tracing_options_;
 };
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 class AsyncAccessTokenGeneratorTracing : public MinimalIamCredentialsStub {
  public:
   explicit AsyncAccessTokenGeneratorTracing(
@@ -197,8 +196,6 @@ class AsyncAccessTokenGeneratorTracing : public MinimalIamCredentialsStub {
   std::shared_ptr<opentelemetry::context::propagation::TextMapPropagator>
       propagator_;
 };
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 }  // namespace
 
 std::shared_ptr<MinimalIamCredentialsStub> DecorateMinimalIamCredentialsStub(
@@ -209,11 +206,9 @@ std::shared_ptr<MinimalIamCredentialsStub> DecorateMinimalIamCredentialsStub(
     impl = std::make_shared<AsyncAccessTokenGeneratorLogging>(
         std::move(impl), options.get<GrpcTracingOptionsOption>());
   }
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
   if (TracingEnabled(options)) {
     impl = std::make_shared<AsyncAccessTokenGeneratorTracing>(std::move(impl));
   }
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
   return impl;
 }
 
diff --git a/google/cloud/internal/minimal_iam_credentials_stub_test.cc b/google/cloud/internal/minimal_iam_credentials_stub_test.cc
index a5363beef6386..1cd3cab0c1638 100644
--- a/google/cloud/internal/minimal_iam_credentials_stub_test.cc
+++ b/google/cloud/internal/minimal_iam_credentials_stub_test.cc
@@ -219,7 +219,6 @@ TEST_F(MinimalIamCredentialsStubTest, LoggingComponentNames) {
   }
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::DisableTracing;
 using ::google::cloud::testing_util::EnableTracing;
 using ::google::cloud::testing_util::OTelAttribute;
@@ -342,7 +341,6 @@ TEST_F(MinimalIamCredentialsStubTest, SignBlobTracing) {
               OTelAttribute<std::string>("grpc.peer", _),
               OTelAttribute<std::string>("gl-cpp.status_code", kErrorCode)))));
 }
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 TEST(MakeMinimalIamCredentialsOptions, Default) {
   auto o = MakeMinimalIamCredentialsOptions(
diff --git a/google/cloud/internal/opentelemetry.cc b/google/cloud/internal/opentelemetry.cc
index fc21f52abae06..04b0593c1fccc 100644
--- a/google/cloud/internal/opentelemetry.cc
+++ b/google/cloud/internal/opentelemetry.cc
@@ -15,21 +15,17 @@
 #include "google/cloud/internal/opentelemetry.h"
 #include "google/cloud/opentelemetry_options.h"
 #include "google/cloud/options.h"
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include <opentelemetry/trace/provider.h>
 #include <opentelemetry/trace/span_startoptions.h>
 #include <sstream>
 #include <string>
 #include <thread>
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 namespace google {
 namespace cloud {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN
 namespace internal {
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 opentelemetry::nostd::shared_ptr<opentelemetry::trace::Tracer> GetTracer(
     Options const&) {
   auto provider = opentelemetry::trace::Provider::GetTracerProvider();
@@ -147,26 +143,16 @@ std::string CurrentThreadId() {
   return std::move(os).str();
 }
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 bool TracingEnabled(Options const& options) {
   return options.get<OpenTelemetryTracingOption>();
 }
-#else
-bool TracingEnabled(Options const&) { return false; }
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 void AddSpanAttribute(Options const& options, std::string const& key,
                       std::string const& value) {
   if (!TracingEnabled(options)) return;
   auto span = opentelemetry::trace::Tracer::GetCurrentSpan();
   span->SetAttribute(key, value);
 }
-#else
-void AddSpanAttribute(Options const&, std::string const&, std::string const&) {}
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 }  // namespace internal
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
diff --git a/google/cloud/internal/opentelemetry.h b/google/cloud/internal/opentelemetry.h
index 375da5125e7bd..bd4ffe84ee42f 100644
--- a/google/cloud/internal/opentelemetry.h
+++ b/google/cloud/internal/opentelemetry.h
@@ -21,25 +21,21 @@
 #include "google/cloud/status.h"
 #include "google/cloud/status_or.h"
 #include "google/cloud/version.h"
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include <opentelemetry/context/propagation/text_map_propagator.h>
 #include <opentelemetry/nostd/shared_ptr.h>
 #include <opentelemetry/nostd/string_view.h>
 #include <opentelemetry/trace/span.h>
 #include <opentelemetry/trace/span_context_kv_iterable_view.h>
 #include <opentelemetry/trace/tracer.h>
-#include <string>
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include <chrono>
 #include <functional>
+#include <string>
 
 namespace google {
 namespace cloud {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN
 namespace internal {
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 /**
  * Returns a [tracer] to use for creating [spans].
  *
@@ -234,8 +230,6 @@ std::string ToString(opentelemetry::trace::SpanId const& span_id);
 /// Gets the current thread id.
 std::string CurrentThreadId();
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 bool TracingEnabled(Options const& options);
 
 /// Wraps the sleeper in a span, if tracing is enabled.
@@ -244,7 +238,6 @@ std::function<void(std::chrono::duration<Rep, Period>)> MakeTracedSleeper(
     Options const& options,
     std::function<void(std::chrono::duration<Rep, Period>)> sleeper,
     std::string const& name) {
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
   if (TracingEnabled(options)) {
     return [name, sleeper = std::move(sleeper)](
                std::chrono::duration<Rep, Period> d) {
@@ -255,7 +248,6 @@ std::function<void(std::chrono::duration<Rep, Period>)> MakeTracedSleeper(
       span->End();
     };
   }
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
   (void)options;
   (void)name;
   return sleeper;
diff --git a/google/cloud/internal/opentelemetry_context.cc b/google/cloud/internal/opentelemetry_context.cc
index 9afda7f15cec9..44f15067b78d1 100644
--- a/google/cloud/internal/opentelemetry_context.cc
+++ b/google/cloud/internal/opentelemetry_context.cc
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/internal/opentelemetry_context.h"
 #include <opentelemetry/nostd/unique_ptr.h>
 
@@ -76,4 +75,3 @@ OTelScope::~OTelScope() { DetachOTelContext(context_); }
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace cloud
 }  // namespace google
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/internal/opentelemetry_context.h b/google/cloud/internal/opentelemetry_context.h
index 124715826ed8f..c821a63fc18a9 100644
--- a/google/cloud/internal/opentelemetry_context.h
+++ b/google/cloud/internal/opentelemetry_context.h
@@ -15,7 +15,6 @@
 #ifndef GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_OPENTELEMETRY_CONTEXT_H
 #define GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_OPENTELEMETRY_CONTEXT_H
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/version.h"
 #include <opentelemetry/context/context.h>
 #include <opentelemetry/context/runtime_context.h>
@@ -125,6 +124,5 @@ class ScopedOTelContext {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace cloud
 }  // namespace google
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 #endif  // GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_OPENTELEMETRY_CONTEXT_H
diff --git a/google/cloud/internal/opentelemetry_context_test.cc b/google/cloud/internal/opentelemetry_context_test.cc
index 06c3a206fe541..dea9890cba137 100644
--- a/google/cloud/internal/opentelemetry_context_test.cc
+++ b/google/cloud/internal/opentelemetry_context_test.cc
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/internal/opentelemetry_context.h"
 #include "google/cloud/internal/opentelemetry.h"
 #include "google/cloud/testing_util/opentelemetry_matchers.h"
@@ -177,4 +176,3 @@ TEST_F(OTelContextTest, ThreadLocalStorage) {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace cloud
 }  // namespace google
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/internal/opentelemetry_test.cc b/google/cloud/internal/opentelemetry_test.cc
index 0de694de1df4c..96358259d1712 100644
--- a/google/cloud/internal/opentelemetry_test.cc
+++ b/google/cloud/internal/opentelemetry_test.cc
@@ -18,10 +18,8 @@
 #include "google/cloud/testing_util/opentelemetry_matchers.h"
 #include "google/cloud/testing_util/status_matchers.h"
 #include <gmock/gmock.h>
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include <opentelemetry/trace/default_span.h>
 #include <opentelemetry/version.h>
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 namespace google {
 namespace cloud {
@@ -32,7 +30,6 @@ namespace {
 using ms = std::chrono::milliseconds;
 using ::testing::MockFunction;
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::DisableTracing;
 using ::google::cloud::testing_util::EnableTracing;
 using ::google::cloud::testing_util::InstallSpanCatcher;
@@ -447,23 +444,6 @@ TEST(OpenTelemetry, AddSpanAttributeDisabled) {
           Not(SpanHasAttributes(OTelAttribute<std::string>("key", "value"))))));
 }
 
-#else
-
-TEST(NoOpenTelemetry, TracingEnabled) {
-  EXPECT_FALSE(TracingEnabled(Options{}));
-}
-
-TEST(NoOpenTelemetry, MakeTracedSleeper) {
-  MockFunction<void(ms)> mock_sleeper;
-  EXPECT_CALL(mock_sleeper, Call(ms(42)));
-
-  auto sleeper = mock_sleeper.AsStdFunction();
-  auto result = MakeTracedSleeper(Options{}, sleeper, "Backoff");
-  result(ms(42));
-}
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 }  // namespace
 }  // namespace internal
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
diff --git a/google/cloud/internal/rest_carrier.cc b/google/cloud/internal/rest_carrier.cc
index 7b700fe20db3a..719b966c3a50f 100644
--- a/google/cloud/internal/rest_carrier.cc
+++ b/google/cloud/internal/rest_carrier.cc
@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/internal/rest_carrier.h"
 #include "google/cloud/internal/noexcept_action.h"
 #include "google/cloud/internal/rest_context.h"
@@ -44,5 +42,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace rest_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/internal/rest_carrier.h b/google/cloud/internal/rest_carrier.h
index f201ee35960c3..a36e721ac3e94 100644
--- a/google/cloud/internal/rest_carrier.h
+++ b/google/cloud/internal/rest_carrier.h
@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #ifndef GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_REST_CARRIER_H
 #define GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_REST_CARRIER_H
 
@@ -53,5 +51,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace google
 
 #endif  // GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_REST_CARRIER_H
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/internal/rest_carrier_test.cc b/google/cloud/internal/rest_carrier_test.cc
index b059cbe6f7027..62661b8402e4b 100644
--- a/google/cloud/internal/rest_carrier_test.cc
+++ b/google/cloud/internal/rest_carrier_test.cc
@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/internal/rest_carrier.h"
 #include <gmock/gmock.h>
 
@@ -42,5 +40,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace rest_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/internal/rest_opentelemetry.cc b/google/cloud/internal/rest_opentelemetry.cc
index 9df10a71c2837..b06ba040589ab 100644
--- a/google/cloud/internal/rest_opentelemetry.cc
+++ b/google/cloud/internal/rest_opentelemetry.cc
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/internal/rest_opentelemetry.h"
 #include "google/cloud/internal/absl_str_cat_quiet.h"
 #include "google/cloud/internal/opentelemetry.h"
@@ -100,5 +99,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace rest_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/internal/rest_opentelemetry.h b/google/cloud/internal/rest_opentelemetry.h
index 825e70b602701..16c5e74c71991 100644
--- a/google/cloud/internal/rest_opentelemetry.h
+++ b/google/cloud/internal/rest_opentelemetry.h
@@ -15,7 +15,6 @@
 #ifndef GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_REST_OPENTELEMETRY_H
 #define GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_REST_OPENTELEMETRY_H
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/internal/rest_request.h"
 #include "google/cloud/internal/trace_propagator.h"
 #include "google/cloud/options.h"
@@ -61,6 +60,4 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace cloud
 }  // namespace google
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #endif  // GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_REST_OPENTELEMETRY_H
diff --git a/google/cloud/internal/rest_opentelemetry_test.cc b/google/cloud/internal/rest_opentelemetry_test.cc
index 23228a6461cb2..672e60ab86f03 100644
--- a/google/cloud/internal/rest_opentelemetry_test.cc
+++ b/google/cloud/internal/rest_opentelemetry_test.cc
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/internal/rest_opentelemetry.h"
 #include "google/cloud/testing_util/opentelemetry_matchers.h"
 #include "google/cloud/testing_util/status_matchers.h"
@@ -101,5 +100,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace rest_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/internal/rest_retry_loop_test.cc b/google/cloud/internal/rest_retry_loop_test.cc
index 79e17cc8dc648..2d98af733e4ee 100644
--- a/google/cloud/internal/rest_retry_loop_test.cc
+++ b/google/cloud/internal/rest_retry_loop_test.cc
@@ -235,7 +235,6 @@ TEST(RestRetryLoopTest, ExhaustedOnStart) {
   EXPECT_THAT(metadata, Contains(Pair("gcloud-cpp.retry.function", __func__)));
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::DisableTracing;
 using ::google::cloud::testing_util::EnableTracing;
 using ::google::cloud::testing_util::SpanNamed;
@@ -272,8 +271,6 @@ TEST(RestRetryLoopTest, TracingDisabled) {
   EXPECT_THAT(spans, IsEmpty());
 }
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 }  // namespace
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace rest_internal
diff --git a/google/cloud/internal/retry_loop_test.cc b/google/cloud/internal/retry_loop_test.cc
index 2040bbd5a4fc8..e85341d4f4c1a 100644
--- a/google/cloud/internal/retry_loop_test.cc
+++ b/google/cloud/internal/retry_loop_test.cc
@@ -276,7 +276,6 @@ TEST(RetryLoopTest, ConfigureContext) {
       /*request=*/0, "error message");
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::DisableTracing;
 using ::google::cloud::testing_util::EnableTracing;
 using ::google::cloud::testing_util::SpanNamed;
@@ -313,8 +312,6 @@ TEST(RetryLoopTest, TracingDisabled) {
   EXPECT_THAT(spans, IsEmpty());
 }
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 }  // namespace
 }  // namespace internal
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
diff --git a/google/cloud/internal/streaming_read_rpc_tracing.h b/google/cloud/internal/streaming_read_rpc_tracing.h
index 36125b12051c7..71c885920fd71 100644
--- a/google/cloud/internal/streaming_read_rpc_tracing.h
+++ b/google/cloud/internal/streaming_read_rpc_tracing.h
@@ -15,7 +15,6 @@
 #ifndef GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_STREAMING_READ_RPC_TRACING_H
 #define GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_STREAMING_READ_RPC_TRACING_H
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/internal/grpc_opentelemetry.h"
 #include "google/cloud/internal/grpc_request_metadata.h"
 #include "google/cloud/internal/opentelemetry.h"
@@ -77,6 +76,5 @@ class StreamingReadRpcTracing : public StreamingReadRpc<ResponseType> {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace cloud
 }  // namespace google
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 #endif  // GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_STREAMING_READ_RPC_TRACING_H
diff --git a/google/cloud/internal/streaming_read_rpc_tracing_test.cc b/google/cloud/internal/streaming_read_rpc_tracing_test.cc
index b7f276d42c48b..7f7083adef5ac 100644
--- a/google/cloud/internal/streaming_read_rpc_tracing_test.cc
+++ b/google/cloud/internal/streaming_read_rpc_tracing_test.cc
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/internal/streaming_read_rpc_tracing.h"
 #include "google/cloud/internal/opentelemetry.h"
 #include "google/cloud/testing_util/opentelemetry_matchers.h"
@@ -165,4 +164,3 @@ TEST(StreamingReadRpcTracingTest, SpanEndsOnDestruction) {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace cloud
 }  // namespace google
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/internal/streaming_write_rpc_tracing.h b/google/cloud/internal/streaming_write_rpc_tracing.h
index 695efa7e65620..dc0624e17f77b 100644
--- a/google/cloud/internal/streaming_write_rpc_tracing.h
+++ b/google/cloud/internal/streaming_write_rpc_tracing.h
@@ -15,7 +15,6 @@
 #ifndef GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_STREAMING_WRITE_RPC_TRACING_H
 #define GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_STREAMING_WRITE_RPC_TRACING_H
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/internal/grpc_opentelemetry.h"
 #include "google/cloud/internal/grpc_request_metadata.h"
 #include "google/cloud/internal/opentelemetry.h"
@@ -82,6 +81,5 @@ class StreamingWriteRpcTracing
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace cloud
 }  // namespace google
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 #endif  // GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_STREAMING_WRITE_RPC_TRACING_H
diff --git a/google/cloud/internal/streaming_write_rpc_tracing_test.cc b/google/cloud/internal/streaming_write_rpc_tracing_test.cc
index d2d37ae363fb4..29dd467b59df7 100644
--- a/google/cloud/internal/streaming_write_rpc_tracing_test.cc
+++ b/google/cloud/internal/streaming_write_rpc_tracing_test.cc
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/internal/streaming_write_rpc_tracing.h"
 #include "google/cloud/internal/opentelemetry.h"
 #include "google/cloud/testing_util/opentelemetry_matchers.h"
@@ -180,4 +179,3 @@ TEST(StreamingWriteRpcTracingTest, SpanEndsOnDestruction) {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace cloud
 }  // namespace google
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/internal/trace_propagator.cc b/google/cloud/internal/trace_propagator.cc
index 8e46cacc2cce9..856f314330d41 100644
--- a/google/cloud/internal/trace_propagator.cc
+++ b/google/cloud/internal/trace_propagator.cc
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/internal/trace_propagator.h"
 #include "google/cloud/internal/absl_str_cat_quiet.h"
 #include "absl/strings/numbers.h"
@@ -104,5 +103,3 @@ MakePropagator() {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/internal/trace_propagator.h b/google/cloud/internal/trace_propagator.h
index 7a70844e83c85..47accb5ec8820 100644
--- a/google/cloud/internal/trace_propagator.h
+++ b/google/cloud/internal/trace_propagator.h
@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #ifndef GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_TRACE_PROPAGATOR_H
 #define GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_TRACE_PROPAGATOR_H
 
@@ -50,5 +48,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace google
 
 #endif  // GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_TRACE_PROPAGATOR_H
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/internal/trace_propagator_test.cc b/google/cloud/internal/trace_propagator_test.cc
index 66e4fba1b3c26..c6c9e17b773a5 100644
--- a/google/cloud/internal/trace_propagator_test.cc
+++ b/google/cloud/internal/trace_propagator_test.cc
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/internal/trace_propagator.h"
 #include <gmock/gmock.h>
 #include <opentelemetry/trace/default_span.h>
@@ -114,4 +113,3 @@ TEST(CloudTraceContextPropagator, Fields) {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace cloud
 }  // namespace google
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/internal/traced_stream_range.h b/google/cloud/internal/traced_stream_range.h
index e31106e6b6bfc..8342febf24c72 100644
--- a/google/cloud/internal/traced_stream_range.h
+++ b/google/cloud/internal/traced_stream_range.h
@@ -15,7 +15,6 @@
 #ifndef GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_TRACED_STREAM_RANGE_H
 #define GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_TRACED_STREAM_RANGE_H
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/internal/opentelemetry.h"
 #include "google/cloud/stream_range.h"
 #include <opentelemetry/nostd/shared_ptr.h>
@@ -81,6 +80,5 @@ StreamRange<T> MakeTracedStreamRange(
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace cloud
 }  // namespace google
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 #endif  // GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_TRACED_STREAM_RANGE_H
diff --git a/google/cloud/internal/traced_stream_range_test.cc b/google/cloud/internal/traced_stream_range_test.cc
index aef5efd6e5404..e0dafd3a66a49 100644
--- a/google/cloud/internal/traced_stream_range_test.cc
+++ b/google/cloud/internal/traced_stream_range_test.cc
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/internal/traced_stream_range.h"
 #include "google/cloud/mocks/mock_stream_range.h"
 #include "google/cloud/internal/make_status.h"
@@ -129,4 +128,3 @@ TEST(TracedStreamRange, SpanInactiveWhileIterating) {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace cloud
 }  // namespace google
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/internal/tracing_http_payload.cc b/google/cloud/internal/tracing_http_payload.cc
index 6f79d864c34b3..b05219f500fd6 100644
--- a/google/cloud/internal/tracing_http_payload.cc
+++ b/google/cloud/internal/tracing_http_payload.cc
@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/internal/tracing_http_payload.h"
 #include "google/cloud/internal/opentelemetry.h"
 #include <chrono>
@@ -66,5 +64,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace rest_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/internal/tracing_http_payload.h b/google/cloud/internal/tracing_http_payload.h
index 26af6771ae58b..0b8939ff0ff6c 100644
--- a/google/cloud/internal/tracing_http_payload.h
+++ b/google/cloud/internal/tracing_http_payload.h
@@ -15,8 +15,6 @@
 #ifndef GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_TRACING_HTTP_PAYLOAD_H
 #define GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_TRACING_HTTP_PAYLOAD_H
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/internal/http_payload.h"
 #include <opentelemetry/nostd/shared_ptr.h>
 #include <opentelemetry/trace/span.h>
@@ -48,6 +46,4 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace cloud
 }  // namespace google
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #endif  // GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_TRACING_HTTP_PAYLOAD_H
diff --git a/google/cloud/internal/tracing_http_payload_test.cc b/google/cloud/internal/tracing_http_payload_test.cc
index 7a309a55c0d66..24c6ad4dbc607 100644
--- a/google/cloud/internal/tracing_http_payload_test.cc
+++ b/google/cloud/internal/tracing_http_payload_test.cc
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/internal/tracing_http_payload.h"
 #include "google/cloud/internal/rest_opentelemetry.h"
 #include "google/cloud/testing_util/mock_http_payload.h"
@@ -130,5 +129,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace rest_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/internal/tracing_rest_client.cc b/google/cloud/internal/tracing_rest_client.cc
index 0badc6ffeb709..94aa7f807abfe 100644
--- a/google/cloud/internal/tracing_rest_client.cc
+++ b/google/cloud/internal/tracing_rest_client.cc
@@ -13,7 +13,6 @@
 // limitations under the License.
 
 #include "google/cloud/internal/tracing_rest_client.h"
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/internal/absl_str_cat_quiet.h"
 #include "google/cloud/internal/opentelemetry.h"
 #include "google/cloud/internal/rest_opentelemetry.h"
@@ -231,22 +230,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace rest_internal
 }  // namespace cloud
 }  // namespace google
-
-#else
-
-namespace google {
-namespace cloud {
-namespace rest_internal {
-GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN
-
-std::unique_ptr<RestClient> MakeTracingRestClient(
-    std::unique_ptr<RestClient> client) {
-  return client;
-}
-
-GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
-}  // namespace rest_internal
-}  // namespace cloud
-}  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/internal/tracing_rest_client_test.cc b/google/cloud/internal/tracing_rest_client_test.cc
index 9a9ff8a267b57..9e5994bd4dae3 100644
--- a/google/cloud/internal/tracing_rest_client_test.cc
+++ b/google/cloud/internal/tracing_rest_client_test.cc
@@ -19,11 +19,9 @@
 #include "google/cloud/testing_util/opentelemetry_matchers.h"
 #include "google/cloud/testing_util/status_matchers.h"
 #include <gmock/gmock.h>
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include <opentelemetry/context/propagation/global_propagator.h>
 #include <opentelemetry/semconv/incubating/network_attributes.h>
 #include <opentelemetry/trace/propagation/http_trace_context.h>
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 namespace google {
 namespace cloud {
@@ -48,7 +46,6 @@ std::string MockContents() {
   return "The quick brown fox jumps over the lazy dog";
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::EventNamed;
 using ::google::cloud::testing_util::InstallSpanCatcher;
 using ::google::cloud::testing_util::OTelAttribute;
@@ -360,39 +357,6 @@ TEST(TracingRestClient, CachedConnection) {
                         SpanHasEvents(EventNamed("gl-cpp.curl.connected")))));
 }
 
-#else
-
-TEST(TracingRestClient, NoOpenTelemetry) {
-  auto impl = std::make_unique<MockRestClient>();
-  EXPECT_CALL(*impl, Delete).WillOnce([](RestContext&, RestRequest const&) {
-    auto response = std::make_unique<MockRestResponse>();
-    EXPECT_CALL(*response, StatusCode)
-        .WillRepeatedly(Return(HttpStatusCode::kOk));
-    EXPECT_CALL(*response, Headers).WillRepeatedly(Return(MockHeaders()));
-    EXPECT_CALL(std::move(*response), ExtractPayload).WillOnce([] {
-      return MakeMockHttpPayloadSuccess(MockContents());
-    });
-    return std::unique_ptr<RestResponse>(std::move(response));
-  });
-
-  auto constexpr kUrl = "https://storage.googleapis.com/storage/v1/b/my-bucket";
-  RestRequest request(kUrl);
-  request.AddHeader("x-test-header-3", "value3");
-
-  auto client = MakeTracingRestClient(std::move(impl));
-  rest_internal::RestContext context;
-  auto r = client->Delete(context, request);
-  ASSERT_STATUS_OK(r);
-  auto response = *std::move(r);
-  ASSERT_THAT(response, NotNull());
-  EXPECT_THAT(response->StatusCode(), Eq(HttpStatusCode::kOk));
-  EXPECT_THAT(response->Headers(), ElementsAreArray(MockHeaders()));
-  auto contents = ReadAll(std::move(*response).ExtractPayload());
-  EXPECT_THAT(contents, IsOkAndHolds(MockContents()));
-}
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 }  // namespace
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace rest_internal
diff --git a/google/cloud/internal/tracing_rest_response.cc b/google/cloud/internal/tracing_rest_response.cc
index 9e00d853cecd5..f1d15cc326694 100644
--- a/google/cloud/internal/tracing_rest_response.cc
+++ b/google/cloud/internal/tracing_rest_response.cc
@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/internal/tracing_rest_response.h"
 #include "google/cloud/internal/tracing_http_payload.h"
 
@@ -40,5 +38,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace rest_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/internal/tracing_rest_response.h b/google/cloud/internal/tracing_rest_response.h
index 21f2bd7d9d5ff..177b23e8ce072 100644
--- a/google/cloud/internal/tracing_rest_response.h
+++ b/google/cloud/internal/tracing_rest_response.h
@@ -15,8 +15,6 @@
 #ifndef GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_TRACING_REST_RESPONSE_H
 #define GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_TRACING_REST_RESPONSE_H
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/internal/rest_response.h"
 #include <opentelemetry/nostd/shared_ptr.h>
 #include <opentelemetry/trace/span.h>
@@ -49,6 +47,4 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace cloud
 }  // namespace google
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #endif  // GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_TRACING_REST_RESPONSE_H
diff --git a/google/cloud/internal/tracing_rest_response_test.cc b/google/cloud/internal/tracing_rest_response_test.cc
index f95f4b6280938..b2151ee63c732 100644
--- a/google/cloud/internal/tracing_rest_response_test.cc
+++ b/google/cloud/internal/tracing_rest_response_test.cc
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/internal/tracing_rest_response.h"
 #include "google/cloud/internal/rest_opentelemetry.h"
 #include "google/cloud/testing_util/mock_http_payload.h"
@@ -99,5 +98,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace rest_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/opentelemetry/integration_tests/configure_basic_tracing_integration_test.cc b/google/cloud/opentelemetry/integration_tests/configure_basic_tracing_integration_test.cc
index ba8a8e9e8167e..63cecebcaba3a 100644
--- a/google/cloud/opentelemetry/integration_tests/configure_basic_tracing_integration_test.cc
+++ b/google/cloud/opentelemetry/integration_tests/configure_basic_tracing_integration_test.cc
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/opentelemetry/configure_basic_tracing.h"
 #include "google/cloud/trace/v1/trace_client.h"
 #include "google/cloud/internal/getenv.h"
@@ -160,4 +159,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace otel
 }  // namespace cloud
 }  // namespace google
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/opentelemetry/internal/resource_detector_impl_test.cc b/google/cloud/opentelemetry/internal/resource_detector_impl_test.cc
index 6ef69ba3b3513..d30e444c1d1a2 100644
--- a/google/cloud/opentelemetry/internal/resource_detector_impl_test.cc
+++ b/google/cloud/opentelemetry/internal/resource_detector_impl_test.cc
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/opentelemetry/internal/resource_detector_impl.h"
 #include "google/cloud/internal/absl_str_cat_quiet.h"
 #include "google/cloud/internal/compute_engine_util.h"
@@ -518,4 +517,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace otel
 }  // namespace cloud
 }  // namespace google
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/opentelemetry/trace_exporter_test.cc b/google/cloud/opentelemetry/trace_exporter_test.cc
index 08802fb19f0f8..bc8cdf8695227 100644
--- a/google/cloud/opentelemetry/trace_exporter_test.cc
+++ b/google/cloud/opentelemetry/trace_exporter_test.cc
@@ -116,7 +116,6 @@ TEST(TraceExporter, LogsOnError) {
                      HasSubstr("UNAVAILABLE"), HasSubstr("try again later"))));
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::InstallSpanCatcher;
 using ::google::cloud::testing_util::ScopedEnvironment;
 using ::testing::IsEmpty;
@@ -140,7 +139,6 @@ TEST(TraceExporter, NoInfiniteExportLoop14611) {
   // Verify that no spans were created.
   EXPECT_THAT(span_catcher->GetSpans(), IsEmpty());
 }
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 }  // namespace
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
diff --git a/google/cloud/pubsub/integration_tests/blocking_publisher_integration_test.cc b/google/cloud/pubsub/integration_tests/blocking_publisher_integration_test.cc
index 8b35712edec5b..750011f6b5513 100644
--- a/google/cloud/pubsub/integration_tests/blocking_publisher_integration_test.cc
+++ b/google/cloud/pubsub/integration_tests/blocking_publisher_integration_test.cc
@@ -71,7 +71,6 @@ TEST_F(BlockingPublisherIntegrationTest, Basic) {
   ASSERT_STATUS_OK(publish);
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::DisableTracing;
 using ::google::cloud::testing_util::EnableTracing;
 
@@ -90,7 +89,6 @@ TEST_F(BlockingPublisherIntegrationTest, TracingDisabled) {
       publisher.Publish(topic_, MessageBuilder().SetData("test data").Build());
   ASSERT_STATUS_OK(publish);
 }
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 }  // namespace
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
diff --git a/google/cloud/pubsub/internal/batching_publisher_tracing_connection.cc b/google/cloud/pubsub/internal/batching_publisher_tracing_connection.cc
index f9631e9d25a9f..eb2f14eb39ba3 100644
--- a/google/cloud/pubsub/internal/batching_publisher_tracing_connection.cc
+++ b/google/cloud/pubsub/internal/batching_publisher_tracing_connection.cc
@@ -15,16 +15,13 @@
 #include "google/cloud/pubsub/internal/batching_publisher_tracing_connection.h"
 #include "google/cloud/pubsub/publisher_connection.h"
 #include "google/cloud/internal/opentelemetry.h"
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include <opentelemetry/semconv/incubating/code_attributes.h>
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 namespace google {
 namespace cloud {
 namespace pubsub_internal {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 namespace {
 
 class BatchingPublisherTracingConnection : public pubsub::PublisherConnection {
@@ -73,16 +70,6 @@ MakeBatchingPublisherTracingConnection(
       std::move(connection));
 }
 
-#else  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
-std::shared_ptr<pubsub::PublisherConnection>
-MakeBatchingPublisherTracingConnection(
-    std::shared_ptr<pubsub::PublisherConnection> connection) {
-  return connection;
-}
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace pubsub_internal
 }  // namespace cloud
diff --git a/google/cloud/pubsub/internal/blocking_publisher_tracing_connection.cc b/google/cloud/pubsub/internal/blocking_publisher_tracing_connection.cc
index ec8b244947b42..ef3e98e115654 100644
--- a/google/cloud/pubsub/internal/blocking_publisher_tracing_connection.cc
+++ b/google/cloud/pubsub/internal/blocking_publisher_tracing_connection.cc
@@ -13,7 +13,6 @@
 // limitations under the License.
 
 #include "google/cloud/pubsub/internal/blocking_publisher_tracing_connection.h"
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/pubsub/message.h"
 #include "google/cloud/pubsub/topic.h"
 #include "google/cloud/internal/opentelemetry.h"
@@ -23,14 +22,12 @@
 #include <opentelemetry/semconv/incubating/messaging_attributes.h>
 #include <opentelemetry/trace/scope.h>
 #include <opentelemetry/trace/span_startoptions.h>
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 namespace google {
 namespace cloud {
 namespace pubsub_internal {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 namespace {
 
 opentelemetry::nostd::shared_ptr<opentelemetry::trace::Span> StartPublishSpan(
@@ -95,16 +92,6 @@ MakeBlockingPublisherTracingConnection(
       std::move(connection));
 }
 
-#else  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
-std::shared_ptr<pubsub::BlockingPublisherConnection>
-MakeBlockingPublisherTracingConnection(
-    std::shared_ptr<pubsub::BlockingPublisherConnection> connection) {
-  return connection;
-}
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace pubsub_internal
 }  // namespace cloud
diff --git a/google/cloud/pubsub/internal/blocking_publisher_tracing_connection_test.cc b/google/cloud/pubsub/internal/blocking_publisher_tracing_connection_test.cc
index a370c713600c4..62eafd27b7528 100644
--- a/google/cloud/pubsub/internal/blocking_publisher_tracing_connection_test.cc
+++ b/google/cloud/pubsub/internal/blocking_publisher_tracing_connection_test.cc
@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/pubsub/internal/blocking_publisher_tracing_connection.h"
 #include "google/cloud/pubsub/blocking_publisher_connection.h"
 #include "google/cloud/pubsub/message.h"
@@ -193,5 +191,3 @@ TEST(MakeBlockingPublisherTracingConnectionTest, CreateTracingConnection) {
 }  // namespace pubsub_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/pubsub/internal/extend_leases_with_retry.cc b/google/cloud/pubsub/internal/extend_leases_with_retry.cc
index 94d12aab022a2..0caa2dbaf47a8 100644
--- a/google/cloud/pubsub/internal/extend_leases_with_retry.cc
+++ b/google/cloud/pubsub/internal/extend_leases_with_retry.cc
@@ -185,8 +185,6 @@ class ExtendLeasesHandle
   int attempts_ = 0;
 };
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 class TracingLeaseManagement : public LeaseManagement {
  public:
   TracingLeaseManagement(std::shared_ptr<LeaseManagement> child,
@@ -221,15 +219,6 @@ std::shared_ptr<LeaseManagement> MakeTracingLeaseManagement(
                                                   std::move(batch_callback));
 }
 
-#else  // #ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
-std::shared_ptr<LeaseManagement> MakeTracingLeaseManagement(
-    std::shared_ptr<LeaseManagement> impl, std::shared_ptr<BatchCallback>) {
-  return impl;
-}
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 }  // namespace
 
 future<Status> ExtendLeasesWithRetry(
diff --git a/google/cloud/pubsub/internal/extend_leases_with_retry_test.cc b/google/cloud/pubsub/internal/extend_leases_with_retry_test.cc
index 3d06e67ee356b..d5fbd92ea69b3 100644
--- a/google/cloud/pubsub/internal/extend_leases_with_retry_test.cc
+++ b/google/cloud/pubsub/internal/extend_leases_with_retry_test.cc
@@ -190,8 +190,6 @@ TEST(ExtendLeasesWithRetry, FailureTooManyTransients) {
   EXPECT_THAT(log_lines, Contains(HasSubstr("ack_id=test-003")));
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 TEST(ExtendLeasesWithRetry, SuccessWithOtelEnabled) {
   auto mock = std::make_shared<MockSubscriberStub>();
   auto mock_cq = std::make_shared<MockCompletionQueueImpl>();
@@ -231,8 +229,6 @@ TEST(ExtendLeasesWithRetry, SuccessWithOtelEnabled) {
   EXPECT_STATUS_OK(result.get());
 }
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace pubsub_internal
 }  // namespace cloud
diff --git a/google/cloud/pubsub/internal/flow_controlled_publisher_tracing_connection.cc b/google/cloud/pubsub/internal/flow_controlled_publisher_tracing_connection.cc
index 93c0c73cd3f5b..c60bde49a69ad 100644
--- a/google/cloud/pubsub/internal/flow_controlled_publisher_tracing_connection.cc
+++ b/google/cloud/pubsub/internal/flow_controlled_publisher_tracing_connection.cc
@@ -14,19 +14,15 @@
 
 #include "google/cloud/pubsub/internal/flow_controlled_publisher_tracing_connection.h"
 #include "google/cloud/pubsub/publisher_connection.h"
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/internal/opentelemetry.h"
 #include <opentelemetry/semconv/incubating/code_attributes.h>
 #include <opentelemetry/trace/context.h>
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 namespace google {
 namespace cloud {
 namespace pubsub_internal {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 namespace {
 class FlowControlledPublisherTracingConnection
     : public pubsub::PublisherConnection {
@@ -75,16 +71,6 @@ MakeFlowControlledPublisherTracingConnection(
       std::move(connection));
 }
 
-#else  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
-std::shared_ptr<pubsub::PublisherConnection>
-MakeFlowControlledPublisherTracingConnection(
-    std::shared_ptr<pubsub::PublisherConnection> connection) {
-  return connection;
-}
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace pubsub_internal
 }  // namespace cloud
diff --git a/google/cloud/pubsub/internal/flow_controlled_publisher_tracing_connection_test.cc b/google/cloud/pubsub/internal/flow_controlled_publisher_tracing_connection_test.cc
index 5a29ff4f9fc74..c9c55d415c516 100644
--- a/google/cloud/pubsub/internal/flow_controlled_publisher_tracing_connection_test.cc
+++ b/google/cloud/pubsub/internal/flow_controlled_publisher_tracing_connection_test.cc
@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/pubsub/internal/flow_controlled_publisher_tracing_connection.h"
 #include "google/cloud/pubsub/mocks/mock_publisher_connection.h"
 #include "google/cloud/pubsub/publisher_connection.h"
@@ -139,5 +137,3 @@ TEST(MakeFlowControlledPublisherTracingConnectionTest,
 }  // namespace pubsub_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/pubsub/internal/message_carrier.cc b/google/cloud/pubsub/internal/message_carrier.cc
index 74e6e7b226231..c3efd005dd22d 100644
--- a/google/cloud/pubsub/internal/message_carrier.cc
+++ b/google/cloud/pubsub/internal/message_carrier.cc
@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/pubsub/internal/message_carrier.h"
 #include "google/cloud/pubsub/message.h"
 #include "google/cloud/internal/absl_str_cat_quiet.h"
@@ -52,5 +50,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace pubsub_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/pubsub/internal/message_carrier.h b/google/cloud/pubsub/internal/message_carrier.h
index 9e8e9d48d4423..f48744484ad24 100644
--- a/google/cloud/pubsub/internal/message_carrier.h
+++ b/google/cloud/pubsub/internal/message_carrier.h
@@ -15,8 +15,6 @@
 #ifndef GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_PUBSUB_INTERNAL_MESSAGE_CARRIER_H
 #define GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_PUBSUB_INTERNAL_MESSAGE_CARRIER_H
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/pubsub/message.h"
 #include "google/cloud/version.h"
 #include <opentelemetry/context/propagation/text_map_propagator.h>
@@ -60,6 +58,4 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace cloud
 }  // namespace google
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #endif  // GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_PUBSUB_INTERNAL_MESSAGE_CARRIER_H
diff --git a/google/cloud/pubsub/internal/message_carrier_test.cc b/google/cloud/pubsub/internal/message_carrier_test.cc
index 621e0f11df190..d212013d047d7 100644
--- a/google/cloud/pubsub/internal/message_carrier_test.cc
+++ b/google/cloud/pubsub/internal/message_carrier_test.cc
@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/pubsub/internal/message_carrier.h"
 #include "google/cloud/pubsub/message.h"
 #include <gmock/gmock.h>
@@ -71,5 +69,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace pubsub_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/pubsub/internal/message_propagator.cc b/google/cloud/pubsub/internal/message_propagator.cc
index d433d8301bf28..2b032a4c455f5 100644
--- a/google/cloud/pubsub/internal/message_propagator.cc
+++ b/google/cloud/pubsub/internal/message_propagator.cc
@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/pubsub/internal/message_propagator.h"
 #include "google/cloud/pubsub/internal/message_carrier.h"
 #include "google/cloud/pubsub/message.h"
@@ -45,5 +43,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace pubsub_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/pubsub/internal/message_propagator.h b/google/cloud/pubsub/internal/message_propagator.h
index a04176c5fed0b..1bbd10c71574c 100644
--- a/google/cloud/pubsub/internal/message_propagator.h
+++ b/google/cloud/pubsub/internal/message_propagator.h
@@ -15,8 +15,6 @@
 #ifndef GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_PUBSUB_INTERNAL_MESSAGE_PROPAGATOR_H
 #define GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_PUBSUB_INTERNAL_MESSAGE_PROPAGATOR_H
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/pubsub/internal/message_carrier.h"
 #include "google/cloud/pubsub/message.h"
 #include <opentelemetry/context/context.h>
@@ -48,6 +46,4 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace cloud
 }  // namespace google
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #endif  // GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_PUBSUB_INTERNAL_MESSAGE_PROPAGATOR_H
diff --git a/google/cloud/pubsub/internal/message_propagator_test.cc b/google/cloud/pubsub/internal/message_propagator_test.cc
index d948369b02a50..f9584343eb575 100644
--- a/google/cloud/pubsub/internal/message_propagator_test.cc
+++ b/google/cloud/pubsub/internal/message_propagator_test.cc
@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/pubsub/internal/message_propagator.h"
 #include "google/cloud/pubsub/internal/message_carrier.h"
 #include "google/cloud/pubsub/message.h"
@@ -77,5 +75,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace pubsub_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/pubsub/internal/publisher_stub_factory_test.cc b/google/cloud/pubsub/internal/publisher_stub_factory_test.cc
index 3619fb4da450b..3c6eb462cbba9 100644
--- a/google/cloud/pubsub/internal/publisher_stub_factory_test.cc
+++ b/google/cloud/pubsub/internal/publisher_stub_factory_test.cc
@@ -205,7 +205,6 @@ TEST_F(PublisherStubFactory, Logging) {
   EXPECT_THAT(log.ExtractLines(), Contains(HasSubstr("CreateTopic")));
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::DisableTracing;
 using ::google::cloud::testing_util::EnableTracing;
 using ::google::cloud::testing_util::SpanNamed;
@@ -284,7 +283,6 @@ TEST_F(PublisherStubFactory, TracingDisabled) {
 
   EXPECT_THAT(span_catcher->GetSpans(), IsEmpty());
 }
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 // The following tests are for all the rpcs on the stub.
 TEST_F(PublisherStubFactory, CreateTopic) {
diff --git a/google/cloud/pubsub/internal/publisher_tracing_connection.cc b/google/cloud/pubsub/internal/publisher_tracing_connection.cc
index f1e19476d35a7..e64ecddca409f 100644
--- a/google/cloud/pubsub/internal/publisher_tracing_connection.cc
+++ b/google/cloud/pubsub/internal/publisher_tracing_connection.cc
@@ -13,18 +13,14 @@
 // limitations under the License.
 
 #include "google/cloud/pubsub/internal/publisher_tracing_connection.h"
+#include "google/cloud/pubsub/internal/message_propagator.h"
 #include "google/cloud/pubsub/message.h"
 #include "google/cloud/pubsub/publisher_connection.h"
 #include "google/cloud/future.h"
-#include "google/cloud/status.h"
-#include "google/cloud/version.h"
-#include <memory>
-#include <string>
-#include <utility>
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-#include "google/cloud/pubsub/internal/message_propagator.h"
 #include "google/cloud/internal/opentelemetry.h"
+#include "google/cloud/status.h"
 #include "google/cloud/status_or.h"
+#include "google/cloud/version.h"
 #include <opentelemetry/context/propagation/text_map_propagator.h>
 #include <opentelemetry/nostd/shared_ptr.h>
 #include <opentelemetry/semconv/incubating/code_attributes.h>
@@ -33,14 +29,15 @@
 #include <opentelemetry/trace/scope.h>
 #include <opentelemetry/trace/span_metadata.h>
 #include <opentelemetry/trace/span_startoptions.h>
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
+#include <memory>
+#include <string>
+#include <utility>
 
 namespace google {
 namespace cloud {
 namespace pubsub_internal {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 namespace {
 
 opentelemetry::nostd::shared_ptr<opentelemetry::trace::Span> StartPublishSpan(
@@ -132,16 +129,6 @@ std::shared_ptr<pubsub::PublisherConnection> MakePublisherTracingConnection(
                                                       std::move(connection));
 }
 
-#else  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
-std::shared_ptr<pubsub::PublisherConnection> MakePublisherTracingConnection(
-    pubsub::Topic,  // NOLINT(performance-unnecessary-value-param)
-    std::shared_ptr<pubsub::PublisherConnection> connection) {
-  return connection;
-}
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace pubsub_internal
 }  // namespace cloud
diff --git a/google/cloud/pubsub/internal/publisher_tracing_connection_test.cc b/google/cloud/pubsub/internal/publisher_tracing_connection_test.cc
index 44b0d23cee8fe..a86ffe4313c42 100644
--- a/google/cloud/pubsub/internal/publisher_tracing_connection_test.cc
+++ b/google/cloud/pubsub/internal/publisher_tracing_connection_test.cc
@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/pubsub/internal/publisher_tracing_connection.h"
 #include "google/cloud/pubsub/message.h"
 #include "google/cloud/pubsub/mocks/mock_publisher_connection.h"
@@ -257,5 +255,3 @@ TEST(MakePublisherTracingConnectionTest, CreateTracingConnection) {
 }  // namespace pubsub_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/pubsub/internal/pull_ack_handler_factory_test.cc b/google/cloud/pubsub/internal/pull_ack_handler_factory_test.cc
index 1116d12b78e99..0d5aa2a3c0467 100644
--- a/google/cloud/pubsub/internal/pull_ack_handler_factory_test.cc
+++ b/google/cloud/pubsub/internal/pull_ack_handler_factory_test.cc
@@ -93,7 +93,6 @@ TEST(PullAckHandlerTest, AckSimple) {
   pending.first.set_value(false);
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::DisableTracing;
 using ::google::cloud::testing_util::EnableTracing;
 using ::google::cloud::testing_util::SpanHasInstrumentationScope;
@@ -177,8 +176,6 @@ TEST(PullAckHandlerTest, TracingDisabled) {
   EXPECT_THAT(span_catcher->GetSpans(), IsEmpty());
 }
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 }  // namespace
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace pubsub_internal
diff --git a/google/cloud/pubsub/internal/pull_lease_manager_factory_test.cc b/google/cloud/pubsub/internal/pull_lease_manager_factory_test.cc
index 49d8797c620e1..112b6cf13b088 100644
--- a/google/cloud/pubsub/internal/pull_lease_manager_factory_test.cc
+++ b/google/cloud/pubsub/internal/pull_lease_manager_factory_test.cc
@@ -89,7 +89,6 @@ TEST(DefaultPullLeaseManager, ExtendLeaseDeadlineSimple) {
   EXPECT_STATUS_OK(status.get());
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::DisableTracing;
 using ::google::cloud::testing_util::EnableTracing;
 using ::google::cloud::testing_util::SpanHasInstrumentationScope;
@@ -168,8 +167,6 @@ TEST(DefaultPullLeaseManager, TracingDisabled) {
   EXPECT_THAT(span_catcher->GetSpans(), IsEmpty());
 }
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 }  // namespace
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace pubsub_internal
diff --git a/google/cloud/pubsub/internal/span.h b/google/cloud/pubsub/internal/span.h
index c32e925117d8c..9ff2298df6a7e 100644
--- a/google/cloud/pubsub/internal/span.h
+++ b/google/cloud/pubsub/internal/span.h
@@ -16,9 +16,7 @@
 #define GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_PUBSUB_INTERNAL_SPAN_H
 
 #include "google/cloud/pubsub/version.h"
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include <opentelemetry/trace/span.h>
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include <memory>
 
 namespace google {
@@ -28,12 +26,10 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN
 
 /**
  * Span class stores an OpenTelemetery span which can only be accessed by code
- * compiled with GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY.
+ * compiled with Opentelemetry.
  */
 struct Span {
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
   opentelemetry::nostd::shared_ptr<opentelemetry::trace::Span> span;
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 };
 
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
diff --git a/google/cloud/pubsub/internal/subscriber_stub_factory_test.cc b/google/cloud/pubsub/internal/subscriber_stub_factory_test.cc
index 9b0b62ca719d7..e29af3adbc8e5 100644
--- a/google/cloud/pubsub/internal/subscriber_stub_factory_test.cc
+++ b/google/cloud/pubsub/internal/subscriber_stub_factory_test.cc
@@ -206,7 +206,6 @@ TEST_F(SubscriberStubFactory, Logging) {
   EXPECT_THAT(log.ExtractLines(), Contains(HasSubstr("CreateSubscription")));
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::DisableTracing;
 using ::google::cloud::testing_util::EnableTracing;
 using ::google::cloud::testing_util::SpanNamed;
@@ -286,7 +285,6 @@ TEST_F(SubscriberStubFactory, TracingDisabled) {
 
   EXPECT_THAT(span_catcher->GetSpans(), IsEmpty());
 }
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 }  // namespace
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
diff --git a/google/cloud/pubsub/internal/subscriber_tracing_connection.cc b/google/cloud/pubsub/internal/subscriber_tracing_connection.cc
index 6e3cd1380efdf..5b9e0b193ce48 100644
--- a/google/cloud/pubsub/internal/subscriber_tracing_connection.cc
+++ b/google/cloud/pubsub/internal/subscriber_tracing_connection.cc
@@ -17,21 +17,17 @@
 #include "google/cloud/pubsub/options.h"
 #include "google/cloud/grpc_options.h"
 #include "google/cloud/internal/opentelemetry.h"
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include <opentelemetry/context/propagation/text_map_propagator.h>
 #include <opentelemetry/semconv/incubating/code_attributes.h>
 #include <opentelemetry/semconv/incubating/messaging_attributes.h>
 #include <opentelemetry/trace/propagation/http_trace_context.h>
 #include <opentelemetry/trace/span_startoptions.h>
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 namespace google {
 namespace cloud {
 namespace pubsub_internal {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 namespace {
 
 opentelemetry::nostd::shared_ptr<opentelemetry::trace::Span> StartPullSpan() {
@@ -133,15 +129,6 @@ std::shared_ptr<pubsub::SubscriberConnection> MakeSubscriberTracingConnection(
   return std::make_shared<SubscriberTracingConnection>(std::move(connection));
 }
 
-#else  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
-std::shared_ptr<pubsub::SubscriberConnection> MakeSubscriberTracingConnection(
-    std::shared_ptr<pubsub::SubscriberConnection> connection) {
-  return connection;
-}
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace pubsub_internal
 }  // namespace cloud
diff --git a/google/cloud/pubsub/internal/subscriber_tracing_connection_test.cc b/google/cloud/pubsub/internal/subscriber_tracing_connection_test.cc
index 5e2d5cea82fe5..1ebf2feb8a2b6 100644
--- a/google/cloud/pubsub/internal/subscriber_tracing_connection_test.cc
+++ b/google/cloud/pubsub/internal/subscriber_tracing_connection_test.cc
@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/pubsub/internal/subscriber_tracing_connection.h"
 #include "google/cloud/pubsub/ack_handler.h"
 #include "google/cloud/pubsub/exactly_once_ack_handler.h"
@@ -346,5 +344,3 @@ TEST(SubscriberTracingConnectionTest, options) {
 }  // namespace pubsub_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/pubsub/internal/subscription_session_test.cc b/google/cloud/pubsub/internal/subscription_session_test.cc
index 2dd2d6056718c..584c95aebfb3d 100644
--- a/google/cloud/pubsub/internal/subscription_session_test.cc
+++ b/google/cloud/pubsub/internal/subscription_session_test.cc
@@ -28,13 +28,11 @@
 #include "google/cloud/testing_util/opentelemetry_matchers.h"
 #include "google/cloud/testing_util/scoped_log.h"
 #include "google/cloud/testing_util/status_matchers.h"
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
+#include <gmock/gmock.h>
 #include <opentelemetry/context/propagation/text_map_propagator.h>
 #include <opentelemetry/semconv/incubating/messaging_attributes.h>
 #include <opentelemetry/trace/propagation/http_trace_context.h>
 #include <opentelemetry/trace/scope.h>
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-#include <gmock/gmock.h>
 #include <atomic>
 #include <chrono>
 #include <thread>
@@ -203,8 +201,6 @@ TEST(SubscriptionSessionTest, ScheduleCallbacks) {
   ScheduleCallbacks(/*ack_count=*/100, /*enable_open_telemetry=*/false);
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 using ::google::cloud::testing_util::InstallSpanCatcher;
 using ::google::cloud::testing_util::OTelAttribute;
 using ::google::cloud::testing_util::SpanHasAttributes;
@@ -234,8 +230,6 @@ TEST(SubscriptionSessionTest, ScheduleCallbacksWithOtelEnabled) {
                              sc::messaging::kMessagingSystem, "gcp_pubsub")))));
 }
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 /// @test Verify callbacks are scheduled in the background threads.
 TEST(SubscriptionSessionTest, ScheduleCallbacksExactlyOnce) {
   auto mock = std::make_shared<pubsub_testing::MockSubscriberStub>();
diff --git a/google/cloud/pubsub/internal/tracing_batch_callback.cc b/google/cloud/pubsub/internal/tracing_batch_callback.cc
index e2c29b0c35fb1..8196fcc6fea00 100644
--- a/google/cloud/pubsub/internal/tracing_batch_callback.cc
+++ b/google/cloud/pubsub/internal/tracing_batch_callback.cc
@@ -17,21 +17,17 @@
 #include "google/cloud/pubsub/subscription.h"
 #include "google/cloud/pubsub/version.h"
 #include "google/cloud/internal/opentelemetry.h"
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/pubsub/v1/pubsub.pb.h"
 #include <opentelemetry/context/propagation/text_map_propagator.h>
 #include <opentelemetry/semconv/incubating/messaging_attributes.h>
 #include <opentelemetry/trace/propagation/http_trace_context.h>
 #include <opentelemetry/trace/span_startoptions.h>
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 namespace google {
 namespace cloud {
 namespace pubsub_internal {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 namespace {
 
 opentelemetry::nostd::shared_ptr<opentelemetry::trace::Span> StartSubscribeSpan(
@@ -298,16 +294,6 @@ std::shared_ptr<BatchCallback> MakeTracingBatchCallback(
                                                 subscription);
 }
 
-#else  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
-std::shared_ptr<BatchCallback> MakeTracingBatchCallback(
-    std::shared_ptr<BatchCallback> batch_callback,
-    pubsub::Subscription const&) {
-  return batch_callback;
-}
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace pubsub_internal
 }  // namespace cloud
diff --git a/google/cloud/pubsub/internal/tracing_batch_callback_test.cc b/google/cloud/pubsub/internal/tracing_batch_callback_test.cc
index 89058a02e7c56..36034f7f5ca44 100644
--- a/google/cloud/pubsub/internal/tracing_batch_callback_test.cc
+++ b/google/cloud/pubsub/internal/tracing_batch_callback_test.cc
@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/pubsub/internal/tracing_batch_callback.h"
 #include "google/cloud/pubsub/internal/message_propagator.h"
 #include "google/cloud/pubsub/message.h"
@@ -524,5 +522,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace pubsub_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/pubsub/internal/tracing_batch_sink.cc b/google/cloud/pubsub/internal/tracing_batch_sink.cc
index 16bb4ab75c8a7..962f628cfe7d4 100644
--- a/google/cloud/pubsub/internal/tracing_batch_sink.cc
+++ b/google/cloud/pubsub/internal/tracing_batch_sink.cc
@@ -13,7 +13,6 @@
 // limitations under the License.
 
 #include "google/cloud/pubsub/internal/tracing_batch_sink.h"
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/pubsub/internal/publisher_stub.h"
 #include "google/cloud/pubsub/internal/tracing_helpers.h"
 #include "google/cloud/pubsub/options.h"
@@ -28,15 +27,12 @@
 #include <opentelemetry/trace/span.h>
 #include <algorithm>
 #include <string>
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 namespace google {
 namespace cloud {
 namespace pubsub_internal {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 namespace {
 using Spans =
     std::vector<opentelemetry::nostd::shared_ptr<opentelemetry::trace::Span>>;
@@ -213,15 +209,6 @@ std::shared_ptr<BatchSink> MakeTracingBatchSink(
       std::move(topic), std::move(batch_sink), std::move(opts));
 }
 
-#else  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
-std::shared_ptr<BatchSink> MakeTracingBatchSink(
-    pubsub::Topic, std::shared_ptr<BatchSink> batch_sink, Options) {
-  return batch_sink;
-}
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace pubsub_internal
 }  // namespace cloud
diff --git a/google/cloud/pubsub/internal/tracing_batch_sink_test.cc b/google/cloud/pubsub/internal/tracing_batch_sink_test.cc
index d01d6967d84d6..f7641c9cd0c3d 100644
--- a/google/cloud/pubsub/internal/tracing_batch_sink_test.cc
+++ b/google/cloud/pubsub/internal/tracing_batch_sink_test.cc
@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/pubsub/internal/tracing_batch_sink.h"
 #include "google/cloud/pubsub/message.h"
 #include "google/cloud/pubsub/options.h"
@@ -568,5 +566,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace pubsub_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/pubsub/internal/tracing_exactly_once_ack_handler.cc b/google/cloud/pubsub/internal/tracing_exactly_once_ack_handler.cc
index 075a7a3f5ccad..9f5b0d4f75d93 100644
--- a/google/cloud/pubsub/internal/tracing_exactly_once_ack_handler.cc
+++ b/google/cloud/pubsub/internal/tracing_exactly_once_ack_handler.cc
@@ -18,13 +18,11 @@
 #include "google/cloud/pubsub/version.h"
 #include "google/cloud/internal/opentelemetry.h"
 #include "google/cloud/status.h"
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include <opentelemetry/context/runtime_context.h>
 #include <opentelemetry/semconv/incubating/code_attributes.h>
 #include <opentelemetry/semconv/incubating/messaging_attributes.h>
 #include <opentelemetry/trace/context.h>
 #include <opentelemetry/trace/span.h>
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include <cstdint>
 #include <memory>
 #include <string>
@@ -34,8 +32,6 @@ namespace cloud {
 namespace pubsub_internal {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 namespace {
 
 class TracingExactlyOnceAckHandler
@@ -139,15 +135,6 @@ MakeTracingExactlyOnceAckHandler(
                                                         span.span);
 }
 
-#else  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
-std::unique_ptr<pubsub::ExactlyOnceAckHandler::Impl>
-MakeTracingExactlyOnceAckHandler(
-    std::unique_ptr<pubsub::ExactlyOnceAckHandler::Impl> handler, Span const&) {
-  return handler;
-}
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace pubsub_internal
 }  // namespace cloud
diff --git a/google/cloud/pubsub/internal/tracing_exactly_once_ack_handler_test.cc b/google/cloud/pubsub/internal/tracing_exactly_once_ack_handler_test.cc
index 45490604e319d..8deaff80d2216 100644
--- a/google/cloud/pubsub/internal/tracing_exactly_once_ack_handler_test.cc
+++ b/google/cloud/pubsub/internal/tracing_exactly_once_ack_handler_test.cc
@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/pubsub/internal/tracing_exactly_once_ack_handler.h"
 #include "google/cloud/pubsub/subscription.h"
 #include "google/cloud/pubsub/testing/mock_exactly_once_ack_handler_impl.h"
@@ -317,5 +315,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace pubsub_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/pubsub/internal/tracing_helpers.cc b/google/cloud/pubsub/internal/tracing_helpers.cc
index a03bab767f426..ead3529441452 100644
--- a/google/cloud/pubsub/internal/tracing_helpers.cc
+++ b/google/cloud/pubsub/internal/tracing_helpers.cc
@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/pubsub/internal/tracing_helpers.h"
 #include "google/cloud/pubsub/version.h"
 #include "google/cloud/internal/opentelemetry.h"
@@ -70,5 +68,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace pubsub_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/pubsub/internal/tracing_helpers.h b/google/cloud/pubsub/internal/tracing_helpers.h
index 0e867ff4359d7..eaee01ab1143c 100644
--- a/google/cloud/pubsub/internal/tracing_helpers.h
+++ b/google/cloud/pubsub/internal/tracing_helpers.h
@@ -15,8 +15,6 @@
 #ifndef GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_PUBSUB_INTERNAL_TRACING_HELPERS_H
 #define GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_PUBSUB_INTERNAL_TRACING_HELPERS_H
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/pubsub/pull_ack_handler.h"
 #include "google/cloud/pubsub/version.h"
 #include <opentelemetry/trace/context.h>
@@ -53,6 +51,4 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace cloud
 }  // namespace google
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #endif  // GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_PUBSUB_INTERNAL_TRACING_HELPERS_H
diff --git a/google/cloud/pubsub/internal/tracing_helpers_test.cc b/google/cloud/pubsub/internal/tracing_helpers_test.cc
index 018e0e0c7cc9c..57bed72c2e48c 100644
--- a/google/cloud/pubsub/internal/tracing_helpers_test.cc
+++ b/google/cloud/pubsub/internal/tracing_helpers_test.cc
@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/pubsub/internal/tracing_helpers.h"
 #include "google/cloud/pubsub/options.h"
 #include "google/cloud/internal/opentelemetry.h"
@@ -185,5 +183,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace pubsub_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/pubsub/internal/tracing_message_callback.cc b/google/cloud/pubsub/internal/tracing_message_callback.cc
index 0eb46b73ccf7d..663cecf0b0dfa 100644
--- a/google/cloud/pubsub/internal/tracing_message_callback.cc
+++ b/google/cloud/pubsub/internal/tracing_message_callback.cc
@@ -18,18 +18,14 @@
 #include "google/cloud/pubsub/subscription.h"
 #include "google/cloud/pubsub/version.h"
 #include "google/cloud/internal/opentelemetry.h"
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include <opentelemetry/semconv/incubating/messaging_attributes.h>
 #include <opentelemetry/trace/span_startoptions.h>
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 namespace google {
 namespace cloud {
 namespace pubsub_internal {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 namespace {
 
 class TracingMessageCallback : public MessageCallback {
@@ -70,15 +66,6 @@ std::shared_ptr<MessageCallback> MakeTracingMessageCallback(
                                                   opts);
 }
 
-#else  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
-std::shared_ptr<MessageCallback> MakeTracingMessageCallback(
-    std::shared_ptr<MessageCallback> message_callback, Options const&) {
-  return message_callback;
-}
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace pubsub_internal
 }  // namespace cloud
diff --git a/google/cloud/pubsub/internal/tracing_message_callback_test.cc b/google/cloud/pubsub/internal/tracing_message_callback_test.cc
index 1d53dc8017c96..d2154d94171ed 100644
--- a/google/cloud/pubsub/internal/tracing_message_callback_test.cc
+++ b/google/cloud/pubsub/internal/tracing_message_callback_test.cc
@@ -24,13 +24,11 @@
 #include "google/cloud/testing_util/is_proto_equal.h"
 #include "google/cloud/testing_util/opentelemetry_matchers.h"
 #include "google/cloud/testing_util/status_matchers.h"
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
+#include <gmock/gmock.h>
 #include <opentelemetry/context/propagation/text_map_propagator.h>
 #include <opentelemetry/semconv/incubating/messaging_attributes.h>
 #include <opentelemetry/trace/propagation/http_trace_context.h>
 #include <opentelemetry/trace/scope.h>
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-#include <gmock/gmock.h>
 
 namespace google {
 namespace cloud {
@@ -38,7 +36,6 @@ namespace pubsub_internal {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN
 namespace {
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::InstallSpanCatcher;
 using ::google::cloud::testing_util::OTelAttribute;
 using ::google::cloud::testing_util::SpanHasAttributes;
@@ -130,30 +127,6 @@ TEST(TracingMessageCallback, AddTracingAckHandler) {
                   SpanNamed("test-sub ack")));
 }
 
-#else  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
-using ::testing::IsNull;
-using ::testing::Not;
-
-TEST(TracingMessageCallback,
-     VerifyMessageCallbackIsNotNullWhenOTelIsNotCompiled) {
-  auto mock = std::make_shared<pubsub_testing::MockMessageCallback>();
-  EXPECT_CALL(*mock, user_callback).Times(1);
-  auto message_callback = MakeTracingMessageCallback(
-      std::move(mock), Options{}.set<pubsub::SubscriptionOption>(
-                           pubsub::Subscription("test-project", "test-sub")));
-
-  EXPECT_THAT(message_callback, Not(IsNull()));
-
-  message_callback->user_callback(MessageCallback::MessageAndHandler{
-      pubsub::MessageBuilder().Build(),
-      std::make_unique<pubsub_testing::MockExactlyOnceAckHandlerImpl>(),
-      "ack-id",
-      {}});
-}
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 }  // namespace
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace pubsub_internal
diff --git a/google/cloud/pubsub/internal/tracing_pull_ack_handler.cc b/google/cloud/pubsub/internal/tracing_pull_ack_handler.cc
index 84eaf4c48d5b1..3e4720c5564c1 100644
--- a/google/cloud/pubsub/internal/tracing_pull_ack_handler.cc
+++ b/google/cloud/pubsub/internal/tracing_pull_ack_handler.cc
@@ -17,13 +17,11 @@
 #include "google/cloud/pubsub/version.h"
 #include "google/cloud/internal/opentelemetry.h"
 #include "google/cloud/status.h"
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include <opentelemetry/context/runtime_context.h>
 #include <opentelemetry/semconv/incubating/code_attributes.h>
 #include <opentelemetry/semconv/incubating/messaging_attributes.h>
 #include <opentelemetry/trace/context.h>
 #include <opentelemetry/trace/span.h>
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include <cstdint>
 #include <memory>
 #include <string>
@@ -33,8 +31,6 @@ namespace cloud {
 namespace pubsub_internal {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 class TracingPullAckHandler : public pubsub::PullAckHandler::Impl {
  public:
   explicit TracingPullAckHandler(
@@ -134,15 +130,6 @@ std::unique_ptr<pubsub::PullAckHandler::Impl> MakeTracingPullAckHandler(
   return std::make_unique<TracingPullAckHandler>(std::move(handler));
 }
 
-#else  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
-std::unique_ptr<pubsub::PullAckHandler::Impl> MakeTracingPullAckHandler(
-    std::unique_ptr<pubsub::PullAckHandler::Impl> handler) {
-  return handler;
-}
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace pubsub_internal
 }  // namespace cloud
diff --git a/google/cloud/pubsub/internal/tracing_pull_ack_handler_test.cc b/google/cloud/pubsub/internal/tracing_pull_ack_handler_test.cc
index a1594f9a9911b..4b613566f222a 100644
--- a/google/cloud/pubsub/internal/tracing_pull_ack_handler_test.cc
+++ b/google/cloud/pubsub/internal/tracing_pull_ack_handler_test.cc
@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/pubsub/internal/tracing_pull_ack_handler.h"
 #include "google/cloud/pubsub/mocks/mock_pull_ack_handler.h"
 #include "google/cloud/pubsub/subscription.h"
@@ -313,5 +311,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace pubsub_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/pubsub/internal/tracing_pull_lease_manager.cc b/google/cloud/pubsub/internal/tracing_pull_lease_manager.cc
index 8782283a314f9..b9b39ac47d59d 100644
--- a/google/cloud/pubsub/internal/tracing_pull_lease_manager.cc
+++ b/google/cloud/pubsub/internal/tracing_pull_lease_manager.cc
@@ -19,11 +19,9 @@
 #include "google/cloud/internal/async_retry_loop.h"
 #include "google/cloud/internal/opentelemetry.h"
 #include "google/cloud/status.h"
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include <opentelemetry/semconv/incubating/code_attributes.h>
 #include <opentelemetry/semconv/incubating/messaging_attributes.h>
 #include <opentelemetry/trace/span.h>
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include <memory>
 #include <string>
 
@@ -32,8 +30,6 @@ namespace cloud {
 namespace pubsub_internal {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 class TracingPullLeaseManagerImpl : public PullLeaseManagerImpl {
  public:
   explicit TracingPullLeaseManagerImpl(
@@ -94,16 +90,6 @@ std::shared_ptr<PullLeaseManagerImpl> MakeTracingPullLeaseManagerImpl(
       std::move(manager), std::move(ack_id), std::move(subscription));
 }
 
-#else  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
-std::shared_ptr<PullLeaseManagerImpl> MakeTracingPullLeaseManagerImpl(
-    std::shared_ptr<PullLeaseManagerImpl> manager, std::string,
-    pubsub::Subscription) {
-  return manager;
-}
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace pubsub_internal
 }  // namespace cloud
diff --git a/google/cloud/pubsub/internal/tracing_pull_lease_manager_test.cc b/google/cloud/pubsub/internal/tracing_pull_lease_manager_test.cc
index 711c72765488a..aee9b815276c9 100644
--- a/google/cloud/pubsub/internal/tracing_pull_lease_manager_test.cc
+++ b/google/cloud/pubsub/internal/tracing_pull_lease_manager_test.cc
@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/pubsub/internal/tracing_pull_lease_manager.h"
 #include "google/cloud/pubsub/subscription.h"
 #include "google/cloud/pubsub/testing/mock_pull_lease_manager.h"
@@ -281,5 +279,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace pubsub_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/pubsub/publisher_connection_test.cc b/google/cloud/pubsub/publisher_connection_test.cc
index 0d6ab900ed5a5..bcccf0574fa6c 100644
--- a/google/cloud/pubsub/publisher_connection_test.cc
+++ b/google/cloud/pubsub/publisher_connection_test.cc
@@ -340,7 +340,6 @@ TEST(PublisherConnectionTest, HandleTransientEnabledRetry) {
   EXPECT_EQ("test-message-id-0", *response);
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::DisableTracing;
 using ::google::cloud::testing_util::EnableTracing;
 using ::google::cloud::testing_util::InstallSpanCatcher;
@@ -402,7 +401,6 @@ TEST(MakePublisherConnectionTest, TracingDisabled) {
 
   EXPECT_THAT(span_catcher->GetSpans(), IsEmpty());
 }
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 }  // namespace
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
diff --git a/google/cloud/pubsub/subscriber_connection_test.cc b/google/cloud/pubsub/subscriber_connection_test.cc
index 299e2afa72504..364b4a5431b77 100644
--- a/google/cloud/pubsub/subscriber_connection_test.cc
+++ b/google/cloud/pubsub/subscriber_connection_test.cc
@@ -164,7 +164,6 @@ TEST(SubscriberConnectionTest, MakeSubscriberConnectionSetupsMetadata) {
   ASSERT_STATUS_OK(response.get());
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::DisableTracing;
 using ::google::cloud::testing_util::EnableTracing;
 using ::google::cloud::testing_util::InstallSpanCatcher;
@@ -271,8 +270,6 @@ TEST(MakeSubscriberConnectionTest, TracingDisabledForUnaryPull) {
   EXPECT_THAT(spans, IsEmpty());
 }
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 }  // namespace
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace pubsub
diff --git a/google/cloud/spanner/internal/spanner_stub_factory_test.cc b/google/cloud/spanner/internal/spanner_stub_factory_test.cc
index 65b1c3c45514c..b6315d1de8c26 100644
--- a/google/cloud/spanner/internal/spanner_stub_factory_test.cc
+++ b/google/cloud/spanner/internal/spanner_stub_factory_test.cc
@@ -112,7 +112,6 @@ TEST(DecorateSpannerStub, Logging) {
               Contains(AllOf(HasSubstr("CreateSession"), HasSubstr("fail"))));
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::DisableTracing;
 using ::google::cloud::testing_util::EnableTracing;
 using ::google::cloud::testing_util::SpanNamed;
@@ -168,7 +167,6 @@ TEST(DecorateSpannerStub, TracingDisabled) {
 
   EXPECT_THAT(span_catcher->GetSpans(), IsEmpty());
 }
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 }  // namespace
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
diff --git a/google/cloud/storage/client_test.cc b/google/cloud/storage/client_test.cc
index 07ebb8a424bbc..4ac15c0170eba 100644
--- a/google/cloud/storage/client_test.cc
+++ b/google/cloud/storage/client_test.cc
@@ -196,7 +196,6 @@ TEST_F(ClientTest, LoggingDecoratorsRestClient) {
               ElementsAre("RestStub", "LoggingStub", "StorageConnectionImpl"));
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::DisableTracing;
 using ::google::cloud::testing_util::EnableTracing;
 
@@ -239,8 +238,6 @@ TEST_F(ClientTest, OTelDisableTracing) {
               ElementsAre("RestStub", "LoggingStub", "StorageConnectionImpl"));
 }
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/internal/disable_deprecation_warnings.inc"
 
 TEST_F(ClientTest, DeprecatedButNotDecommissioned) {
diff --git a/google/cloud/storage/internal/async/connection_tracing.cc b/google/cloud/storage/internal/async/connection_tracing.cc
index 66b89607f4031..57526c2b995c5 100644
--- a/google/cloud/storage/internal/async/connection_tracing.cc
+++ b/google/cloud/storage/internal/async/connection_tracing.cc
@@ -27,8 +27,6 @@ namespace cloud {
 namespace storage_internal {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 namespace {
 
 class AsyncConnectionTracing : public storage_experimental::AsyncConnection {
@@ -233,16 +231,6 @@ MakeTracingAsyncConnection(
   return std::make_unique<AsyncConnectionTracing>(std::move(impl));
 }
 
-#else
-
-std::shared_ptr<storage_experimental::AsyncConnection>
-MakeTracingAsyncConnection(
-    std::shared_ptr<storage_experimental::AsyncConnection> impl) {
-  return impl;
-}
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace storage_internal
 }  // namespace cloud
diff --git a/google/cloud/storage/internal/async/connection_tracing_test.cc b/google/cloud/storage/internal/async/connection_tracing_test.cc
index 72bbfaaddf676..a5a0e21c8d71f 100644
--- a/google/cloud/storage/internal/async/connection_tracing_test.cc
+++ b/google/cloud/storage/internal/async/connection_tracing_test.cc
@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/storage/internal/async/connection_tracing.h"
 #include "google/cloud/storage/async/object_descriptor_connection.h"
 #include "google/cloud/storage/async/reader_connection.h"
@@ -744,5 +742,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace storage_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/storage/internal/async/object_descriptor_connection_tracing.cc b/google/cloud/storage/internal/async/object_descriptor_connection_tracing.cc
index d5c841698a98c..9d95f8cd34d0a 100644
--- a/google/cloud/storage/internal/async/object_descriptor_connection_tracing.cc
+++ b/google/cloud/storage/internal/async/object_descriptor_connection_tracing.cc
@@ -17,9 +17,7 @@
 #include "google/cloud/storage/internal/async/reader_connection_tracing.h"
 #include "google/cloud/internal/opentelemetry.h"
 #include "google/cloud/version.h"
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include <opentelemetry/semconv/incubating/thread_attributes.h>
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include <memory>
 
 namespace google {
@@ -27,8 +25,6 @@ namespace cloud {
 namespace storage_internal {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 namespace {
 
 namespace sc = ::opentelemetry::semconv;
@@ -81,8 +77,6 @@ MakeTracingObjectDescriptorConnection(
       std::move(span), std::move(impl));
 }
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace storage_internal
 }  // namespace cloud
diff --git a/google/cloud/storage/internal/async/object_descriptor_connection_tracing.h b/google/cloud/storage/internal/async/object_descriptor_connection_tracing.h
index cff3325993113..8e81c2ff6570b 100644
--- a/google/cloud/storage/internal/async/object_descriptor_connection_tracing.h
+++ b/google/cloud/storage/internal/async/object_descriptor_connection_tracing.h
@@ -16,24 +16,18 @@
 #define GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_STORAGE_INTERNAL_ASYNC_OBJECT_DESCRIPTOR_CONNECTION_TRACING_H
 
 #include "google/cloud/storage/async/object_descriptor_connection.h"
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/internal/opentelemetry.h"
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 namespace google {
 namespace cloud {
 namespace storage_internal {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 std::shared_ptr<storage_experimental::ObjectDescriptorConnection>
 MakeTracingObjectDescriptorConnection(
     opentelemetry::nostd::shared_ptr<opentelemetry::trace::Span> span,
     std::shared_ptr<storage_experimental::ObjectDescriptorConnection> impl);
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace storage_internal
 }  // namespace cloud
diff --git a/google/cloud/storage/internal/async/object_descriptor_connection_tracing_test.cc b/google/cloud/storage/internal/async/object_descriptor_connection_tracing_test.cc
index f0ecb56b9b5f3..2a82fb788776b 100644
--- a/google/cloud/storage/internal/async/object_descriptor_connection_tracing_test.cc
+++ b/google/cloud/storage/internal/async/object_descriptor_connection_tracing_test.cc
@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/storage/internal/async/object_descriptor_connection_tracing.h"
 #include "google/cloud/storage/async/object_descriptor_connection.h"
 #include "google/cloud/storage/mocks/mock_async_object_descriptor_connection.h"
@@ -155,5 +153,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace storage_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/storage/internal/async/object_descriptor_reader_tracing.cc b/google/cloud/storage/internal/async/object_descriptor_reader_tracing.cc
index 4a5868fc55d1d..f070ed5286825 100644
--- a/google/cloud/storage/internal/async/object_descriptor_reader_tracing.cc
+++ b/google/cloud/storage/internal/async/object_descriptor_reader_tracing.cc
@@ -17,9 +17,7 @@
 #include "google/cloud/storage/internal/async/object_descriptor_reader.h"
 #include "google/cloud/internal/opentelemetry.h"
 #include "google/cloud/version.h"
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include <opentelemetry/semconv/incubating/thread_attributes.h>
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include <memory>
 
 namespace google {
@@ -27,8 +25,6 @@ namespace cloud {
 namespace storage_internal {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 namespace {
 
 namespace sc = ::opentelemetry::semconv;
@@ -78,15 +74,6 @@ MakeTracingObjectDescriptorReader(std::shared_ptr<ReadRange> impl) {
   return std::make_unique<ObjectDescriptorReaderTracing>(std::move(impl));
 }
 
-#else  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
-std::unique_ptr<storage_experimental::AsyncReaderConnection>
-MakeTracingObjectDescriptorReader(std::shared_ptr<ReadRange> impl) {
-  return std::make_unique<ObjectDescriptorReader>(std::move(impl));
-}
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace storage_internal
 }  // namespace cloud
diff --git a/google/cloud/storage/internal/async/object_descriptor_reader_tracing_test.cc b/google/cloud/storage/internal/async/object_descriptor_reader_tracing_test.cc
index 47728cb4d2531..5b759637e3596 100644
--- a/google/cloud/storage/internal/async/object_descriptor_reader_tracing_test.cc
+++ b/google/cloud/storage/internal/async/object_descriptor_reader_tracing_test.cc
@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/storage/internal/async/object_descriptor_reader_tracing.h"
 #include "google/cloud/storage/testing/canonical_errors.h"
 #include "google/cloud/opentelemetry_options.h"
@@ -99,5 +97,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace storage_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/storage/internal/async/reader_connection_tracing.cc b/google/cloud/storage/internal/async/reader_connection_tracing.cc
index c912c7b9d138c..f549116e16f8d 100644
--- a/google/cloud/storage/internal/async/reader_connection_tracing.cc
+++ b/google/cloud/storage/internal/async/reader_connection_tracing.cc
@@ -13,8 +13,6 @@
 // limitations under the License.
 
 #include "google/cloud/storage/internal/async/reader_connection_tracing.h"
-
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/internal/opentelemetry.h"
 #include <opentelemetry/semconv/incubating/thread_attributes.h>
 #include <cstdint>
@@ -104,5 +102,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace storage_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/storage/internal/async/reader_connection_tracing.h b/google/cloud/storage/internal/async/reader_connection_tracing.h
index ed74f7756bfc3..46bac9b365839 100644
--- a/google/cloud/storage/internal/async/reader_connection_tracing.h
+++ b/google/cloud/storage/internal/async/reader_connection_tracing.h
@@ -15,8 +15,6 @@
 #ifndef GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_STORAGE_INTERNAL_ASYNC_READER_CONNECTION_TRACING_H
 #define GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_STORAGE_INTERNAL_ASYNC_READER_CONNECTION_TRACING_H
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/storage/async/reader_connection.h"
 #include "google/cloud/internal/opentelemetry.h"
 #include "google/cloud/options.h"
@@ -38,6 +36,4 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace cloud
 }  // namespace google
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #endif  // GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_STORAGE_INTERNAL_ASYNC_READER_CONNECTION_TRACING_H
diff --git a/google/cloud/storage/internal/async/reader_connection_tracing_test.cc b/google/cloud/storage/internal/async/reader_connection_tracing_test.cc
index 1f3db109b9746..e7aa366acb375 100644
--- a/google/cloud/storage/internal/async/reader_connection_tracing_test.cc
+++ b/google/cloud/storage/internal/async/reader_connection_tracing_test.cc
@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/storage/internal/async/reader_connection_tracing.h"
 #include "google/cloud/storage/mocks/mock_async_reader_connection.h"
 #include "google/cloud/storage/testing/canonical_errors.h"
@@ -204,5 +202,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace storage_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/storage/internal/async/rewriter_connection_tracing.cc b/google/cloud/storage/internal/async/rewriter_connection_tracing.cc
index 197b7bfe4cf7a..a7417863e55c9 100644
--- a/google/cloud/storage/internal/async/rewriter_connection_tracing.cc
+++ b/google/cloud/storage/internal/async/rewriter_connection_tracing.cc
@@ -21,8 +21,6 @@ namespace cloud {
 namespace storage_internal {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 namespace {
 
 using google::cloud::internal::EndSpan;
@@ -76,17 +74,6 @@ MakeTracingAsyncRewriterConnection(
                                                           std::move(span));
 }
 
-#else
-
-std::shared_ptr<storage_experimental::AsyncRewriterConnection>
-MakeTracingAsyncRewriterConnection(
-    std::shared_ptr<storage_experimental::AsyncRewriterConnection> impl,
-    bool /*enabled*/) {
-  return impl;
-}
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace storage_internal
 }  // namespace cloud
diff --git a/google/cloud/storage/internal/async/rewriter_connection_tracing_test.cc b/google/cloud/storage/internal/async/rewriter_connection_tracing_test.cc
index 4055895577386..417eabf621e71 100644
--- a/google/cloud/storage/internal/async/rewriter_connection_tracing_test.cc
+++ b/google/cloud/storage/internal/async/rewriter_connection_tracing_test.cc
@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/storage/internal/async/rewriter_connection_tracing.h"
 #include "google/cloud/storage/mocks/mock_async_rewriter_connection.h"
 #include "google/cloud/storage/testing/canonical_errors.h"
@@ -157,5 +155,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace storage_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/storage/internal/async/writer_connection_tracing.cc b/google/cloud/storage/internal/async/writer_connection_tracing.cc
index 56f18a7b6681e..e0b3d4b14cc92 100644
--- a/google/cloud/storage/internal/async/writer_connection_tracing.cc
+++ b/google/cloud/storage/internal/async/writer_connection_tracing.cc
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/storage/internal/async/writer_connection_tracing.h"
 #include "google/cloud/internal/opentelemetry.h"
 #include <opentelemetry/semconv/incubating/thread_attributes.h>
@@ -153,5 +152,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace storage_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/storage/internal/async/writer_connection_tracing.h b/google/cloud/storage/internal/async/writer_connection_tracing.h
index 92ca8838a6d73..2f7e3ab9d650f 100644
--- a/google/cloud/storage/internal/async/writer_connection_tracing.h
+++ b/google/cloud/storage/internal/async/writer_connection_tracing.h
@@ -15,8 +15,6 @@
 #ifndef GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_STORAGE_INTERNAL_ASYNC_WRITER_CONNECTION_TRACING_H
 #define GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_STORAGE_INTERNAL_ASYNC_WRITER_CONNECTION_TRACING_H
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/storage/async/writer_connection.h"
 #include "google/cloud/version.h"
 #include <opentelemetry/nostd/shared_ptr.h>
@@ -38,6 +36,4 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace cloud
 }  // namespace google
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #endif  // GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_STORAGE_INTERNAL_ASYNC_WRITER_CONNECTION_TRACING_H
diff --git a/google/cloud/storage/internal/async/writer_connection_tracing_test.cc b/google/cloud/storage/internal/async/writer_connection_tracing_test.cc
index c0fcc6e55b179..234c34f4c3b28 100644
--- a/google/cloud/storage/internal/async/writer_connection_tracing_test.cc
+++ b/google/cloud/storage/internal/async/writer_connection_tracing_test.cc
@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/storage/internal/async/writer_connection_tracing.h"
 #include "google/cloud/storage/mocks/mock_async_writer_connection.h"
 #include "google/cloud/storage/testing/canonical_errors.h"
@@ -255,5 +253,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace storage_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/storage/internal/connection_impl_test.cc b/google/cloud/storage/internal/connection_impl_test.cc
index 4de482b5ebe87..fd0e59c531c44 100644
--- a/google/cloud/storage/internal/connection_impl_test.cc
+++ b/google/cloud/storage/internal/connection_impl_test.cc
@@ -637,7 +637,6 @@ TEST(RetryClientTest, UploadFinalChunkQueryTooManyMissingPayloads) {
   ASSERT_THAT(response, Not(IsOk()));
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::EnableTracing;
 using ::google::cloud::testing_util::InstallSpanCatcher;
 using ::google::cloud::testing_util::SpanNamed;
@@ -695,7 +694,6 @@ TEST(RetryClientTest, BackoffSpansUploadChunk) {
                   SpanNamed("Backoff"),
                   SpanNamed("storage::Client::WriteObject/UploadChunk")));
 }
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 }  // namespace
 }  // namespace internal
diff --git a/google/cloud/storage/internal/retry_object_read_source_test.cc b/google/cloud/storage/internal/retry_object_read_source_test.cc
index dca08aeabfe08..f264e3e743539 100644
--- a/google/cloud/storage/internal/retry_object_read_source_test.cc
+++ b/google/cloud/storage/internal/retry_object_read_source_test.cc
@@ -489,7 +489,6 @@ TEST(RetryObjectReadSourceTest, DiscardDataForDecompressiveTranscoding) {
               Contains(Pair("x-test-only", "download 3 r1")));
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::DisableTracing;
 using ::google::cloud::testing_util::EnableTracing;
 using ::google::cloud::testing_util::SpanNamed;
@@ -600,8 +599,6 @@ TEST(RetryObjectReadSourceTest, TracingDisabled) {
   EXPECT_THAT(spans, IsEmpty());
 }
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 }  // namespace
 }  // namespace internal
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
diff --git a/google/cloud/storage/internal/storage_stub_factory_test.cc b/google/cloud/storage/internal/storage_stub_factory_test.cc
index e7464a9254e34..4505906939c7e 100644
--- a/google/cloud/storage/internal/storage_stub_factory_test.cc
+++ b/google/cloud/storage/internal/storage_stub_factory_test.cc
@@ -258,7 +258,6 @@ TEST_F(StorageStubFactory, QueryWriteStatus) {
   EXPECT_THAT(log.ExtractLines(), Contains(HasSubstr("QueryWriteStatus")));
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 using ::google::cloud::testing_util::DisableTracing;
 using ::google::cloud::testing_util::EnableTracing;
 using ::google::cloud::testing_util::SpanNamed;
@@ -315,7 +314,6 @@ TEST_F(StorageStubFactory, TracingDisabled) {
 
   EXPECT_THAT(span_catcher->GetSpans(), IsEmpty());
 }
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 }  // namespace
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
diff --git a/google/cloud/storage/internal/tracing_connection.cc b/google/cloud/storage/internal/tracing_connection.cc
index a282a1133cc08..2f8711dc99831 100644
--- a/google/cloud/storage/internal/tracing_connection.cc
+++ b/google/cloud/storage/internal/tracing_connection.cc
@@ -26,8 +26,6 @@ namespace cloud {
 namespace storage_internal {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 TracingConnection::TracingConnection(std::shared_ptr<StorageConnection> impl)
     : impl_(std::move(impl)) {}
 
@@ -507,15 +505,6 @@ std::shared_ptr<storage::internal::StorageConnection> MakeTracingClient(
   return std::make_shared<TracingConnection>(std::move(impl));
 }
 
-#else
-
-std::shared_ptr<storage::internal::StorageConnection> MakeTracingClient(
-    std::shared_ptr<storage::internal::StorageConnection> impl) {
-  return impl;
-}
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace storage_internal
 }  // namespace cloud
diff --git a/google/cloud/storage/internal/tracing_connection.h b/google/cloud/storage/internal/tracing_connection.h
index c59ec011d91ec..66ece3f37f4c7 100644
--- a/google/cloud/storage/internal/tracing_connection.h
+++ b/google/cloud/storage/internal/tracing_connection.h
@@ -27,8 +27,6 @@ namespace cloud {
 namespace storage_internal {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 class TracingConnection : public storage::internal::StorageConnection {
  public:
   explicit TracingConnection(std::shared_ptr<StorageConnection> impl);
@@ -184,8 +182,6 @@ class TracingConnection : public storage::internal::StorageConnection {
   std::shared_ptr<StorageConnection> impl_;
 };
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 std::shared_ptr<storage::internal::StorageConnection> MakeTracingClient(
     std::shared_ptr<storage::internal::StorageConnection> impl);
 
diff --git a/google/cloud/storage/internal/tracing_connection_test.cc b/google/cloud/storage/internal/tracing_connection_test.cc
index 9e952293db9eb..bda9bc46d0a2d 100644
--- a/google/cloud/storage/internal/tracing_connection_test.cc
+++ b/google/cloud/storage/internal/tracing_connection_test.cc
@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/storage/internal/tracing_connection.h"
 #include "google/cloud/storage/object_read_stream.h"
 #include "google/cloud/storage/testing/canonical_errors.h"
@@ -1491,5 +1489,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace storage_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/storage/internal/tracing_object_read_source.cc b/google/cloud/storage/internal/tracing_object_read_source.cc
index 4dc148b1937fa..f6f642a9cd132 100644
--- a/google/cloud/storage/internal/tracing_object_read_source.cc
+++ b/google/cloud/storage/internal/tracing_object_read_source.cc
@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/storage/internal/tracing_object_read_source.h"
 #include "google/cloud/internal/opentelemetry.h"
 #include "google/cloud/status.h"
@@ -80,5 +78,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace storage_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/storage/internal/tracing_object_read_source.h b/google/cloud/storage/internal/tracing_object_read_source.h
index 2914d33584627..2c608f6982565 100644
--- a/google/cloud/storage/internal/tracing_object_read_source.h
+++ b/google/cloud/storage/internal/tracing_object_read_source.h
@@ -15,8 +15,6 @@
 #ifndef GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_STORAGE_INTERNAL_TRACING_OBJECT_READ_SOURCE_H
 #define GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_STORAGE_INTERNAL_TRACING_OBJECT_READ_SOURCE_H
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/storage/internal/object_read_source.h"
 #include "google/cloud/storage/version.h"
 #include "google/cloud/internal/opentelemetry.h"
@@ -57,6 +55,4 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace cloud
 }  // namespace google
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #endif  // GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_STORAGE_INTERNAL_TRACING_OBJECT_READ_SOURCE_H
diff --git a/google/cloud/storage/internal/tracing_object_read_source_test.cc b/google/cloud/storage/internal/tracing_object_read_source_test.cc
index 56edc4e4974b0..43869203758fe 100644
--- a/google/cloud/storage/internal/tracing_object_read_source_test.cc
+++ b/google/cloud/storage/internal/tracing_object_read_source_test.cc
@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 #include "google/cloud/storage/internal/tracing_object_read_source.h"
 #include "google/cloud/storage/testing/canonical_errors.h"
 #include "google/cloud/storage/testing/mock_client.h"
@@ -205,5 +203,3 @@ GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace storage_internal
 }  // namespace cloud
 }  // namespace google
-
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/stream_range_test.cc b/google/cloud/stream_range_test.cc
index 885688127a18c..bced62056bc11 100644
--- a/google/cloud/stream_range_test.cc
+++ b/google/cloud/stream_range_test.cc
@@ -273,8 +273,6 @@ TEST(StreamRange, ReaderDestructorOptionsSpan) {
   // happen with `CurrentOptions()` matching those at `StreamRange` ctor time.
 }
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 using ::google::cloud::testing_util::IsActive;
 
 class FakeReader {
@@ -318,8 +316,6 @@ TEST(StreamRange, CallSpanActiveThroughout) {
   // the active span matching that at `StreamRange` ctor time.
 }
 
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
-
 }  // namespace
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace cloud
diff --git a/google/cloud/testing_util/opentelemetry_matchers.cc b/google/cloud/testing_util/opentelemetry_matchers.cc
index 29298e7c5f4cb..2dbc5c0f1139a 100644
--- a/google/cloud/testing_util/opentelemetry_matchers.cc
+++ b/google/cloud/testing_util/opentelemetry_matchers.cc
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/testing_util/opentelemetry_matchers.h"
 #include "google/cloud/internal/absl_str_join_quiet.h"
 #include "google/cloud/internal/opentelemetry.h"
@@ -223,4 +222,3 @@ Options DisableTracing(Options options) {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace cloud
 }  // namespace google
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
diff --git a/google/cloud/testing_util/opentelemetry_matchers.h b/google/cloud/testing_util/opentelemetry_matchers.h
index 95fe7aeba92b3..885eb5fdcafa7 100644
--- a/google/cloud/testing_util/opentelemetry_matchers.h
+++ b/google/cloud/testing_util/opentelemetry_matchers.h
@@ -15,7 +15,6 @@
 #ifndef GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_TESTING_UTIL_OPENTELEMETRY_MATCHERS_H
 #define GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_TESTING_UTIL_OPENTELEMETRY_MATCHERS_H
 
-#ifdef GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 #include "google/cloud/future.h"
 #include "google/cloud/internal/opentelemetry_context.h"
 #include "google/cloud/options.h"
@@ -403,6 +402,5 @@ class PromiseWithOTelContext {
 GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
 }  // namespace cloud
 }  // namespace google
-#endif  // GOOGLE_CLOUD_CPP_HAVE_OPENTELEMETRY
 
 #endif  // GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_TESTING_UTIL_OPENTELEMETRY_MATCHERS_H