code: def RemoveClientLabels(self, client_id, labels):
      
      for label in labels:
        keyword = self._NormalizeKeyword(label)
        # This might actually delete a keyword with the same name as the label (if
        # there is one).
        data_store.REL_DB.RemoveClientKeyword(client_id, keyword)
        data_store.REL_DB.RemoveClientKeyword(client_id, "label:%s" % keyword)
docs: Removes all labels for a given client.
  
      Args:
        client_id: The client_id.
        labels: A list of labels to remove.