code: def RemoveEventAttribute(self, attribute_name):
      
      if attribute_name not in self._extra_event_attributes:
        raise KeyError('Event attribute: {0:s} not set'.format(attribute_name))
  
      del self._extra_event_attributes[attribute_name]
docs: Removes an attribute from being set on all events produced.
  
      Args:
        attribute_name (str): name of the attribute to remove.
  
      Raises:
        KeyError: if the event attribute is not set.