bpo-40443: Remove unused imports in the stdlib (GH-19803)

Author: vstinner

Lib/asyncio/events.py

@@ -19,7 +19,6 @@
 import threading
 
 from . import format_helpers
-from . import exceptions
 
 
 class Handle:

Lib/asyncio/sslproto.py

@@ -5,7 +5,6 @@
 except ImportError:  # pragma: no cover
     ssl = None
 
-from . import base_events
 from . import constants
 from . import protocols
 from . import transports

Lib/bz2.py

@@ -12,7 +12,6 @@
 from builtins import open as _builtin_open
 import io
 import os
-import warnings
 import _compression
 from threading import RLock
 

Lib/concurrent/futures/process.py

@@ -45,7 +45,6 @@
 
 __author__ = 'Brian Quinlan (brian@sweetapp.com)'
 
-import atexit
 import os
 from concurrent.futures import _base
 import queue

Lib/concurrent/futures/thread.py

@@ -5,7 +5,6 @@
 
 __author__ = 'Brian Quinlan (brian@sweetapp.com)'
 
-import atexit
 from concurrent.futures import _base
 import itertools
 import queue

Lib/ctypes/test/test_loading.py

@@ -3,7 +3,6 @@
 import shutil
 import subprocess
 import sys
-import sysconfig
 import unittest
 import test.support
 from ctypes.util import find_library

Lib/modulefinder.py

@@ -7,8 +7,6 @@
 import os
 import io
 import sys
-import types
-import warnings
 
 
 LOAD_CONST = dis.opmap['LOAD_CONST']

Lib/plistlib.py

@@ -51,15 +51,13 @@
 
 import binascii
 import codecs
-import contextlib
 import datetime
 import enum
 from io import BytesIO
 import itertools
 import os
 import re
 import struct
-from warnings import warn
 from xml.parsers.expat import ParserCreate
 
 

Lib/xml/dom/xmlbuilder.py

@@ -1,7 +1,6 @@
 """Implementation of the DOM Level 3 'LS-Load' feature."""
 
 import copy
-import warnings
 import xml.dom
 
 from xml.dom.NodeFilter import NodeFilter

Lib/zipfile.py

@@ -4,7 +4,6 @@
 XXX references to utf-8 need further investigation.
 """
 import binascii
-import functools
 import importlib.util
 import io
 import itertools