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

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

1 files changed, 0 insertions, 78 deletions

diff --git a/Lib/dummy_threading.py b/Lib/dummy_threading.py
deleted file mode 100644
index 1bb7eee..0000000
--- a/Lib/dummy_threading.py
+++ /dev/null
@@ -1,78 +0,0 @@
-"""Faux ``threading`` version using ``dummy_thread`` instead of ``thread``.
-
-The module ``_dummy_threading`` is added to ``sys.modules`` in order
-to not have ``threading`` considered imported.  Had ``threading`` been
-directly imported it would have made all subsequent imports succeed
-regardless of whether ``_thread`` was available which is not desired.
-
-"""
-from sys import modules as sys_modules
-
-import _dummy_thread
-
-# Declaring now so as to not have to nest ``try``s to get proper clean-up.
-holding_thread = False
-holding_threading = False
-holding__threading_local = False
-
-try:
-    # Could have checked if ``_thread`` was not in sys.modules and gone
-    # a different route, but decided to mirror technique used with
-    # ``threading`` below.
-    if '_thread' in sys_modules:
-        held_thread = sys_modules['_thread']
-        holding_thread = True
-    # Must have some module named ``_thread`` that implements its API
-    # in order to initially import ``threading``.
-    sys_modules['_thread'] = sys_modules['_dummy_thread']
-
-    if 'threading' in sys_modules:
-        # If ``threading`` is already imported, might as well prevent
-        # trying to import it more than needed by saving it if it is
-        # already imported before deleting it.
-        held_threading = sys_modules['threading']
-        holding_threading = True
-        del sys_modules['threading']
-
-    if '_threading_local' in sys_modules:
-        # If ``_threading_local`` is already imported, might as well prevent
-        # trying to import it more than needed by saving it if it is
-        # already imported before deleting it.
-        held__threading_local = sys_modules['_threading_local']
-        holding__threading_local = True
-        del sys_modules['_threading_local']
-
-    import threading
-    # Need a copy of the code kept somewhere...
-    sys_modules['_dummy_threading'] = sys_modules['threading']
-    del sys_modules['threading']
-    sys_modules['_dummy__threading_local'] = sys_modules['_threading_local']
-    del sys_modules['_threading_local']
-    from _dummy_threading import *
-    from _dummy_threading import __all__
-
-finally:
-    # Put back ``threading`` if we overwrote earlier
-
-    if holding_threading:
-        sys_modules['threading'] = held_threading
-        del held_threading
-    del holding_threading
-
-    # Put back ``_threading_local`` if we overwrote earlier
-
-    if holding__threading_local:
-        sys_modules['_threading_local'] = held__threading_local
-        del held__threading_local
-    del holding__threading_local
-
-    # Put back ``thread`` if we overwrote, else del the entry we made
-    if holding_thread:
-        sys_modules['_thread'] = held_thread
-        del held_thread
-    else:
-        del sys_modules['_thread']
-    del holding_thread
-
-    del _dummy_thread
-    del sys_modules