pythongh-131152: Remove unused imports from tests (python#131153)

Author: vstinner

Lib/test/libregrtest/main.py

@@ -15,7 +15,7 @@
 from .findtests import findtests, split_test_packages, list_cases
 from .logger import Logger
 from .pgo import setup_pgo_tests
-from .result import State, TestResult
+from .result import TestResult
 from .results import TestResults, EXITCODE_INTERRUPTED
 from .runtests import RunTests, HuntRefleak
 from .setup import setup_process, setup_test_dir

Lib/test/libregrtest/parallel_case.py

@@ -1,7 +1,6 @@
 """Run a test case multiple times in parallel threads."""
 
 import copy
-import functools
 import threading
 import unittest
 

Lib/test/libregrtest/utils.py

@@ -7,7 +7,6 @@
 import random
 import re
 import shlex
-import signal
 import subprocess
 import sys
 import sysconfig

Lib/test/support/venv.py

@@ -6,7 +6,6 @@
 import sys
 import sysconfig
 import tempfile
-import unittest
 import venv
 
 

Lib/test/test_asyncio/test_events.py

@@ -22,7 +22,6 @@
 import unittest
 from unittest import mock
 import weakref
-import warnings
 if sys.platform not in ('win32', 'vxworks'):
     import tty
 
@@ -36,7 +35,6 @@
 from test.support import socket_helper
 from test.support import threading_helper
 from test.support import ALWAYS_EQ, LARGEST, SMALLEST
-from test.support import warnings_helper
 
 def tearDownModule():
     asyncio._set_event_loop_policy(None)

Lib/test/test_asyncio/test_streams.py

@@ -1,23 +1,20 @@
 """Tests for streams.py."""
 
 import gc
-import os
 import queue
 import pickle
 import socket
-import sys
 import threading
 import unittest
 from unittest import mock
-import warnings
 try:
     import ssl
 except ImportError:
     ssl = None
 
 import asyncio
 from test.test_asyncio import utils as test_utils
-from test.support import requires_subprocess, socket_helper
+from test.support import socket_helper
 
 
 def tearDownModule():

Lib/test/test_asyncio/test_unix_events.py

@@ -10,11 +10,9 @@
 import socket
 import stat
 import sys
-import threading
 import time
 import unittest
 from unittest import mock
-import warnings
 
 from test import support
 from test.support import os_helper
@@ -27,7 +25,6 @@
 
 
 import asyncio
-from asyncio import log
 from asyncio import unix_events
 from test.test_asyncio import utils as test_utils
 

Lib/test/test_asyncio/utils.py

@@ -14,7 +14,6 @@
 import threading
 import unittest
 import weakref
-import warnings
 from ast import literal_eval
 from unittest import mock
 

Lib/test/test_builtin.py

@@ -16,7 +16,6 @@
 import random
 import re
 import sys
-import textwrap
 import traceback
 import types
 import typing

Lib/test/test_bytes.py

@@ -11,7 +11,6 @@
 import copy
 import functools
 import pickle
-import sysconfig
 import tempfile
 import textwrap
 import threading