mypy does not recognize a not implemented async method as an async generator

[ohmayr]

mypy does not recognize the abstract async content method from google.auth.aio.transport.Response as an async generator because it looks for the yield keyword and the abstract method is not implemented. Currently, we've silenced mypy for this issue since the code works as expected.

Follow up on this issue and remove # type: ignore from the relevant spot when fixed. This can be looked up by searching for this issue in the code.

python-api-core/google/api_core/rest_streaming_async.py

Line 52 in 58516ef

self._response_itr = self._response.content().__aiter__()