Update Module docstring for Python 3 (#65748)
Summary:
In Python 3, we can call `super()` without any arguments.
If I understand correctly, Python 2 is no longer supported by PyTorch, so we can change the documentation to be Python-3 only :)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/65748
Reviewed By: saketh-are
Differential Revision: D31246055
Pulled By: albanD
fbshipit-source-id: 3980def1a556d4bdfa391ea61cb2a65efa20df79
