Drop asynctest (#44746)

tests/components/homeassistant/triggers/test_state.py

@@ -1,5 +1,6 @@
 """The test for state automation."""
 from datetime import timedelta
+from unittest.mock import patch
 
 import pytest
 
@@ -10,7 +11,6 @@ from homeassistant.core import Context
 from homeassistant.setup import async_setup_component
 import homeassistant.util.dt as dt_util
 
-from tests.async_mock import patch
 from tests.common import (
     assert_setup_component,
     async_fire_time_changed,