remove unused imports

Author: tamenol

can/notifier.py

@@ -6,7 +6,7 @@
 import logging
 import threading
 import time
-from typing import Any, Callable, cast, Iterable, List, Optional, Union, Awaitable
+from typing import Callable, Iterable, List, Optional, Union, Awaitable
 
 from can.bus import BusABC
 from can.listener import Listener