chore: remove unnecessary polyfills for aiter/anext in tests

Author: chalmerlowe

packages/google-api-core/tests/asyncio/test_bidi_async.py

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import sys
+
 import asyncio
 
 from unittest import mock
@@ -33,15 +33,6 @@
 from google.api_core import bidi_async
 from google.api_core import exceptions
 
-# TODO: remove this when droppping support for "Python 3.10" and below.
-if sys.version_info <= (3, 10):  # type: ignore[operator]
-
-    def aiter(obj):
-        return obj.__aiter__()
-
-    async def anext(obj):
-        return await obj.__anext__()
-
 
 @pytest.mark.asyncio
 class Test_AsyncRequestQueueGenerator: