gh-104992: Remove deprecated unittest.TestProgram.usageExit (#104993)

Doc/whatsnew/3.13.rst

@@ -256,11 +256,16 @@ Removed
   or `python-magic <https://pypi.org/project/python-magic/>`_ instead.
   (Contributed by Victor Stinner in :gh:`104773`.)
 
+* Remove the untested and undocumented :meth:`!unittest.TestProgram.usageExit`
+  method, deprecated in Python 3.11.
+  (Contributed by Hugo van Kemenade in :gh:`104992`.)
+
 * Remove the :mod:`!tkinter.tix` module, deprecated in Python 3.6.  The
   third-party Tix library which the module wrapped is unmaintained.
   (Contributed by Zachary Ware in :gh:`75552`.)
 
 
+
 Porting to Python 3.13
 ======================
 

Lib/unittest/main.py

@@ -104,16 +104,6 @@ def __init__(self, module='__main__', defaultTest=None, argv=None,
         self.parseArgs(argv)
         self.runTests()
 
-    def usageExit(self, msg=None):
-        warnings.warn("TestProgram.usageExit() is deprecated and will be"
-                      " removed in Python 3.13", DeprecationWarning)
-        if msg:
-            print(msg)
-        if self._discovery_parser is None:
-            self._initArgParsers()
-        self._print_help()
-        sys.exit(2)
-
     def _print_help(self, *args, **kwargs):
         if self.module is None:
             print(self._main_parser.format_help())

Misc/NEWS.d/3.11.0a7.rst

@@ -1038,7 +1038,7 @@ Add optional parameter *dir_fd* in :func:`shutil.rmtree`.
 .. nonce: AixHW7
 .. section: Library
 
-:meth:`~unittest.TestProgram.usageExit` is marked deprecated, to be removed
+:meth:`~!unittest.TestProgram.usageExit` is marked deprecated, to be removed
 in 3.13.
 
 ..

Misc/NEWS.d/next/Library/2023-05-26-21-33-24.gh-issue-104992.dbq9WK.rst

@@ -0,0 +1,2 @@
+Remove the untested and undocumented :meth:`!unittest.TestProgram.usageExit`
+method, deprecated in Python 3.11. Patch by Hugo van Kemenade.