Drop asynctest (#44746)

tests/components/zeroconf/test_init.py

@@ -1,4 +1,6 @@
 """Test Zeroconf component setup process."""
+from unittest.mock import patch
+
 from zeroconf import (
     BadTypeInNameException,
     InterfaceChoice,
@@ -17,8 +19,6 @@ from homeassistant.const import (
 from homeassistant.generated import zeroconf as zc_gen
 from homeassistant.setup import async_setup_component
 
-from tests.async_mock import patch
-
 NON_UTF8_VALUE = b"ABCDEF\x8a"
 NON_ASCII_KEY = b"non-ascii-key\x8a"
 PROPERTIES = {