[3.6] Doc: Delete "how do I emulate os.kill" section in Windows FAQ (GH-10487) (GH...

[3.6] Doc: Delete "how do I emulate os.kill" section in Windows FAQ (GH-10487) (GH-10768)

That section is a tip on how to kill process on Windows for Python prior to 2.7 and 3.2.
3.1 end of support was April 2012 and 2.6 was October 2013, so that hasn't been need for supported versions of Python for more than 5 years. Beside not being needed anymore for a long time, when I read it with the eyes of a Python profane, it makes Python looks bad, like a language from the parts with warts you need to circumvent.
Let's delete that :).
(cherry picked from commit a1c40014085d5cc6c12064577e8c10e7182ee9f9)

Co-authored-by: Mathieu Dupuy <deronnax@users.noreply.github.com>