py3: stop rewriting xrange() to pycompat.xrange()...
py3: stop rewriting xrange() to pycompat.xrange()
We now require the use of pycompat.xrange() in source.
One less feature in the module importer gets us one step closer
to Python 3 native source code.
Differential Revision:
https://phab.mercurial-scm.org/D4034
