Drop asynctest (#44746)

tests/components/eafm/test_config_flow.py

@@ -1,11 +1,11 @@
 """Tests for eafm config flow."""
+from unittest.mock import patch
+
 import pytest
 from voluptuous.error import MultipleInvalid
 
 from homeassistant.components.eafm import const
 
-from tests.async_mock import patch
-
 
 async def test_flow_no_discovered_stations(hass, mock_get_stations):
     """Test config flow discovers no station."""