bpo-40443: Remove unused imports in stdlib (GH-19815)

Author: vstinner

Lib/importlib/resources.py

@@ -8,10 +8,9 @@
 from io import BytesIO, TextIOWrapper
 from pathlib import Path
 from types import ModuleType
-from typing import Iterable, Iterator, Optional, Set, Union   # noqa: F401
+from typing import Iterable, Iterator, Optional, Union   # noqa: F401
 from typing import cast
 from typing.io import BinaryIO, TextIO
-from zipimport import ZipImportError
 
 
 __all__ = [

Lib/multiprocessing/pool.py

@@ -22,7 +22,6 @@
 import traceback
 import types
 import warnings
-from queue import Empty
 
 # If threading is available then ThreadPool should be provided.  Therefore
 # we avoid top-level imports which are liable to fail on some systems.

Lib/ssl.py

@@ -252,7 +252,7 @@ class _TLSMessageType(_IntEnum):
 if sys.platform == "win32":
     from _ssl import enum_certificates, enum_crls
 
-from socket import socket, AF_INET, SOCK_STREAM, create_connection
+from socket import socket, SOCK_STREAM, create_connection
 from socket import SOL_SOCKET, SO_TYPE
 import socket as _socket
 import base64        # for DER-to-PEM translation