Remove useless comment

Author: adamtheturtle

tests/mock_vws/test_query.py

@@ -1654,7 +1654,6 @@ def test_date_formats(
             secret_key=secret_key,
             method=method,
             content=content,
-            # Note that this is not the actual Content-Type header value sent.
             content_type='multipart/form-data',
             date=date,
             request_path=request_path,