Drop asynctest (#44746)

tests/components/input_boolean/test_init.py

@@ -1,6 +1,7 @@
 """The tests for the input_boolean component."""
 # pylint: disable=protected-access
 import logging
+from unittest.mock import patch
 
 import pytest
 
@@ -22,7 +23,6 @@ from homeassistant.core import Context, CoreState, State
 from homeassistant.helpers import entity_registry
 from homeassistant.setup import async_setup_component
 
-from tests.async_mock import patch
 from tests.common import mock_component, mock_restore_cache
 
 _LOGGER = logging.getLogger(__name__)