Drop asynctest (#44746)

tests/components/homekit/conftest.py

@@ -1,12 +1,12 @@
 """HomeKit session fixtures."""
+from unittest.mock import patch
+
 from pyhap.accessory_driver import AccessoryDriver
 import pytest
 
 from homeassistant.components.homekit.const import EVENT_HOMEKIT_CHANGED
 from homeassistant.core import callback as ha_callback
 
-from tests.async_mock import patch
-
 
 @pytest.fixture
 def hk_driver(loop):