[$] Unplugging old batteries

<p>Python is famous for being a "batteries included" language-its standardlibrary provides a versatile set of modules with the language-butthere may be times when some of those batteries have reached their end of life. Atthe 2018 Python Language Summit, Christian Heimes wanted to suggest a fewbatteries that may have outlived their usefulness and to discuss how theprocess of retiring standard library modules should work.