[pre-commit.ci] auto fixes from pre-commit.com hooks

Author: pre-commit-ci[bot]

stdlib/urllib/request.pyi

@@ -2,13 +2,12 @@ import ssl
 import sys
 from _typeshed import ReadableBuffer, StrOrBytesPath, SupportsRead
 from collections.abc import Callable, Iterable, Mapping, MutableMapping, Sequence
-from email.message import EmailMessage, Message
+from email.message import Message
 from http.client import HTTPConnection, HTTPMessage, HTTPResponse
 from http.cookiejar import CookieJar
 from re import Pattern
-from types import TracebackType
 from typing import IO, Any, ClassVar, NoReturn, Protocol, TypeVar, overload, type_check_only
-from typing_extensions import Self, TypeAlias, deprecated
+from typing_extensions import TypeAlias, deprecated
 from urllib.error import HTTPError as HTTPError
 from urllib.response import addclosehook, addinfourl