Remove unused imports

Mechanically remove unused imports with:

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

bumble/core.py

@@ -21,7 +21,6 @@ import dataclasses
 import enum
 import struct
 from typing import (
-    TYPE_CHECKING,
     Any,
     ClassVar,
     Iterable,

bumble/device.py

@@ -25,7 +25,6 @@ import itertools
 import json
 import logging
 import secrets
-import sys
 from collections.abc import Iterable, Sequence
 from contextlib import AsyncExitStack, asynccontextmanager, closing
 from dataclasses import dataclass, field

bumble/pandora/__init__.py

@@ -19,7 +19,7 @@ This module implement the Pandora Bluetooth test APIs for the Bumble stack.
 
 __version__ = "0.0.1"
 
-from typing import Callable, List, Optional
+from typing import Callable, Optional
 
 import grpc
 import grpc.aio

bumble/profiles/vcs.py

@@ -22,7 +22,7 @@ import dataclasses
 import enum
 from typing import Sequence
 
-from bumble import att, device, gatt, gatt_adapters, gatt_client, utils
+from bumble import att, device, gatt, gatt_adapters, gatt_client
 
 # -----------------------------------------------------------------------------
 # Constants

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

bumble/utils.py

@@ -22,7 +22,6 @@ import collections
 import enum
 import functools
 import logging
-import sys
 import warnings
 from typing import (
     Any,