Drop asynctest (#44746)

tests/components/samsungtv/test_media_player.py

@@ -2,6 +2,7 @@
 import asyncio
 from datetime import timedelta
 import logging
+from unittest.mock import DEFAULT as DEFAULT_MOCK, Mock, PropertyMock, call, patch
 
 import pytest
 from samsungctl import exceptions
@@ -52,7 +53,6 @@ from homeassistant.const import (
 from homeassistant.setup import async_setup_component
 import homeassistant.util.dt as dt_util
 
-from tests.async_mock import DEFAULT as DEFAULT_MOCK, Mock, PropertyMock, call, patch
 from tests.common import MockConfigEntry, async_fire_time_changed
 
 ENTITY_ID = f"{DOMAIN}.fake"