Remove Modulus snippet and ModularArithmetic export (#216)

Author: fboemer

Snippets/HomomorphicEncryption/ModulusSnippet.swift

@@ -26,6 +26,8 @@
 // * Restrict `Base` to unsigned integers only.
 // * Rename `DoubleWidth` to `DoubleWidthUInt`.
 
+import ModularArithmetic
+
 /// A fixed-width integer that has twice the bit width of its base type.
 ///
 /// You can use the `DoubleWidthUInt` type to continue calculations with the result

Sources/HomomorphicEncryption/DoubleWidthUInt.swift

@@ -12,6 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+import ModularArithmetic
+
 extension Sequence where Element: Hashable {
     @inlinable
     func allUnique() -> Bool {

Sources/HomomorphicEncryption/Exports.swift

@@ -13,6 +13,7 @@
 // limitations under the License.
 
 import HomomorphicEncryption
+import ModularArithmetic
 import Testing
 
 /// A collection of helpers for HeScheme level API tests.

Sources/HomomorphicEncryption/Util.swift

@@ -13,6 +13,7 @@
 // limitations under the License.
 
 import HomomorphicEncryption
+import ModularArithmetic
 import PrivateInformationRetrieval
 import Testing
 

Sources/TestUtilities/HeApiTestUtils.swift

@@ -13,6 +13,7 @@
 // limitations under the License.
 
 import HomomorphicEncryption
+import ModularArithmetic
 import PrivateNearestNeighborSearch
 import Testing
 

Sources/TestUtilities/PirUtilities/ExpansionTests.swift

@@ -13,6 +13,7 @@
 // limitations under the License.
 
 import HomomorphicEncryption
+import ModularArithmetic
 import PrivateNearestNeighborSearch
 import Testing
 

Sources/TestUtilities/PnnsUtilities/CiphertextMatrixTests.swift

@@ -13,6 +13,7 @@
 // limitations under the License.
 
 import HomomorphicEncryption
+import ModularArithmetic
 import PrivateNearestNeighborSearch
 import Testing