Drop asynctest (#44746)

tests/components/rest/test_sensor.py

@@ -1,6 +1,7 @@
 """The tests for the REST sensor platform."""
 import asyncio
 from os import path
+from unittest.mock import patch
 
 import httpx
 import respx
@@ -18,8 +19,6 @@ from homeassistant.const import (
 )
 from homeassistant.setup import async_setup_component
 
-from tests.async_mock import patch
-
 
 async def test_setup_missing_config(hass):
     """Test setup with configuration missing required entries."""