Add test cases for ConfigParser.remove_option() behavior.  This includes coverage to ensure bug #124324 does not re-surface.
Add test cases for ConfigParser.remove_option() behavior.  This includes
coverage to ensure bug #124324 does not re-surface.

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