Try-except for config parsing. Fix for:

File "mime/xdg/actions.py", line 29, in _parseAssociations
    for mime, apps in self.cfg.items(key):
  File "/usr/lib/python2.7/ConfigParser.py", line 347, in items
    raise NoSectionError(section)
ConfigParser.NoSectionError: No section: 'Removed Associations'