Drop asynctest (#44746)

tests/components/arlo/test_sensor.py

@@ -1,5 +1,6 @@
 """The tests for the Netgear Arlo sensors."""
 from collections import namedtuple
+from unittest.mock import patch
 
 import pytest
 
@@ -11,8 +12,6 @@ from homeassistant.const import (
     PERCENTAGE,
 )
 
-from tests.async_mock import patch
-
 
 def _get_named_tuple(input_dict):
     return namedtuple("Struct", input_dict.keys())(*input_dict.values())