Remove unused imports

Mechanically remove unused imports with:

    ruff check --select F401 --fix --extend-exclude grpc_protobuf

bumble/smp.py

@@ -28,16 +28,7 @@ import asyncio
 import enum
 import logging
 from dataclasses import dataclass, field
-from typing import (
-    TYPE_CHECKING,
-    Any,
-    Awaitable,
-    Callable,
-    ClassVar,
-    Optional,
-    TypeVar,
-    cast,
-)
+from typing import TYPE_CHECKING, Awaitable, Callable, ClassVar, Optional, TypeVar, cast
 
 from bumble import crypto, utils
 from bumble.colors import color