Update to Python 2.3, getting rid of backward compatiblity crud.  Get rid of a bunch of module globals that aren't used.
Update to Python 2.3, getting rid of backward compatiblity crud.  Get rid of a
bunch of module globals that aren't used.

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator