[docs] [issue33071] Document that PyPI no longer requires 'register'

Éric Araujo <merwok@netwok.org> added the comment: My preference would be to have 2.7 doc accurate. Let’s wait a little bit to see if someone picks this up? ---------- _______________________________________ Python tracker <report@bugs.python.org> <https://bugs.python.org/issue33071> _______________________________________