bpo-31370: Remove support for threads-less builds (#3385)

* Remove Setup.config
* Always define WITH_THREAD for compatibility.

2 files changed, 2 insertions, 13 deletions

diff --git a/Lib/test/libregrtest/runtest_mp.py b/Lib/test/libregrtest/runtest_mp.py
index 779ff01..31b830d 100644
--- a/Lib/test/libregrtest/runtest_mp.py
+++ b/Lib/test/libregrtest/runtest_mp.py
@@ -3,15 +3,11 @@ import json
 import os
 import queue
 import sys
+import threading
 import time
 import traceback
 import types
 from test import support
-try:
-    import threading
-except ImportError:
-    print("Multiprocess option requires thread support")
-    sys.exit(2)
 
 from test.libregrtest.runtest import (
     runtest, INTERRUPTED, CHILD_ERROR, PROGRESS_MIN_TIME,
diff --git a/Lib/test/libregrtest/save_env.py b/Lib/test/libregrtest/save_env.py
index 3c45621..45b365d 100644
--- a/Lib/test/libregrtest/save_env.py
+++ b/Lib/test/libregrtest/save_env.py
@@ -5,13 +5,10 @@ import os
 import shutil
 import sys
 import sysconfig
+import threading
 import warnings
 from test import support
 try:
-    import threading
-except ImportError:
-    threading = None
-try:
     import _multiprocessing, multiprocessing.process
 except ImportError:
     multiprocessing = None
@@ -181,13 +178,9 @@ class saved_test_environment:
     # Controlling dangling references to Thread objects can make it easier
     # to track reference leaks.
     def get_threading__dangling(self):
-        if not threading:
-            return None
         # This copies the weakrefs without making any strong reference
         return threading._dangling.copy()
     def restore_threading__dangling(self, saved):
-        if not threading:
-            return
         threading._dangling.clear()
         threading._dangling.update(saved)