def RemoveClass(self, class_name):
    if class_name not in self._class_mapping:
      raise problems.NonexistentMapping(class_name)
    del self._class_mapping[class_name]
Removes an entry from the list of known classes.
dataset/ETHPy150Open google/transitfeed/transitfeed/gtfsfactory.py/GtfsFactory.RemoveClass