Removed the following :mod:`unittest` functions, deprecated in Python 3.11:

* :func:`!unittest.findTestCases`
* :func:`!unittest.makeSuite`
* :func:`!unittest.getTestCaseNames`

Use :class:`~unittest.TestLoader` methods instead:

* :meth:`unittest.TestLoader.loadTestsFromModule`
* :meth:`unittest.TestLoader.loadTestsFromTestCase`
* :meth:`unittest.TestLoader.getTestCaseNames`

Patch by Hugo van Kemenade.