These functions do nothing on Python 3.

These methods only work on Python 2.

Thanks Tim for the review.

Forward port of 518693be from stable/1.11.x

This is an obsolete thing that Jenkins builds needed.

io.open() is an alias for open() on Python 3.

__ne__() defaults to the opposite of __eq__() on Python 3
when it doesn't return NotImplemented.

Thanks Tim Graham for the review.

Thanks Tim Graham and Simon Charette for the reviews.

Thanks Tim Graham for the review.