[Python-checkins] gh-105407: Remove unused imports in the stdlib (#105411)

[vstinner]

https://github.com/python/cpython/commit/94d5f9827da4bf4b1e61c134fe29904b2b92f124
commit: 94d5f9827da4bf4b1e61c134fe29904b2b92f124
branch: main
author: Victor Stinner <vstinner at python.org>
committer: vstinner <vstinner at python.org>
date: 2023-06-06T21:13:24Z
summary:

gh-105407: Remove unused imports in the stdlib (#105411)

files:
M Lib/configparser.py
M Lib/importlib/__init__.py
M Lib/importlib/metadata/__init__.py
M Lib/turtle.py
M Lib/unittest/main.py

diff --git a/Lib/configparser.py b/Lib/configparser.py
index 9640f71adc771..682d9736cdc21 100644
--- a/Lib/configparser.py
+++ b/Lib/configparser.py
@@ -147,7 +147,6 @@
 import os
 import re
 import sys
-import warnings
 
 __all__ = ("NoSectionError", "DuplicateOptionError", "DuplicateSectionError",
            "NoOptionError", "InterpolationError", "InterpolationDepthError",
diff --git a/Lib/importlib/__init__.py b/Lib/importlib/__init__.py
index 707c081cb2c5b..f38fe5c1ab461 100644
--- a/Lib/importlib/__init__.py
+++ b/Lib/importlib/__init__.py
@@ -54,8 +54,6 @@
 # Fully bootstrapped at this point, import whatever you like, circular
 # dependencies and startup overhead minimisation permitting :)
 
-import warnings
-
 
 # Public API #########################################################
 
diff --git a/Lib/importlib/metadata/__init__.py b/Lib/importlib/metadata/__init__.py
index 82e0ce1b281c5..5c09666b6a40d 100644
--- a/Lib/importlib/metadata/__init__.py
+++ b/Lib/importlib/metadata/__init__.py
@@ -12,7 +12,6 @@
 import functools
 import itertools
 import posixpath
-import contextlib
 import collections
 import inspect
 
diff --git a/Lib/turtle.py b/Lib/turtle.py
index 54f0efa4c0622..e542bc956897e 100644
--- a/Lib/turtle.py
+++ b/Lib/turtle.py
@@ -104,7 +104,6 @@
 import time
 import inspect
 import sys
-import warnings
 
 from os.path import isfile, split, join
 from copy import deepcopy
diff --git a/Lib/unittest/main.py b/Lib/unittest/main.py
index 03963e0b1b2a0..d29a9f91fcca4 100644
--- a/Lib/unittest/main.py
+++ b/Lib/unittest/main.py
@@ -3,7 +3,6 @@
 import sys
 import argparse
 import os
-import warnings
 
 from . import loader, runner
 from .signals import installHandler