Drop asynctest (#44746)

tests/components/recorder/test_init.py

@@ -1,6 +1,7 @@
 """The tests for the Recorder component."""
 # pylint: disable=protected-access
 from datetime import datetime, timedelta
+from unittest.mock import patch
 
 from sqlalchemy.exc import OperationalError
 
@@ -22,7 +23,6 @@ from homeassistant.util import dt as dt_util
 
 from .common import wait_recording_done
 
-from tests.async_mock import patch
 from tests.common import fire_time_changed, get_test_home_assistant