fix: skip coverage checks for code specific to Pyton 3.7

Since we'll be dropping support for 3.7 soon.

Author: vchudnov-g

google/api_core/_python_package_support.py

@@ -49,7 +49,7 @@ def get_dependency_version(dependency_name: str) -> Optional[PackagingVersion]:
 
         # TODO(https://github.com/googleapis/python-api-core/issues/835): Remove
         # this code path once we drop support for Python 3.7
-        else:
+        else:  # pragma: NO COVER
             # Use pkg_resources, which is part of setuptools.
             import pkg_resources
 

google/api_core/_python_version_support.py

@@ -100,10 +100,10 @@ def _flatten_message(text: str) -> str:
     return textwrap.dedent(text).strip().replace("\n", " ")
 
 
-# TODO: Remove once we no longer support Python3.7
+# TODO: Remove once we no longer support Python 3.7
 if sys.version_info < (3, 8):
 
-    def _get_pypi_package_name(module_name):
+    def _get_pypi_package_name(module_name):  # pragma: NO COVER
         """Determine the PyPI package name for a given module name."""
         return None