docs: def forget(self, label_name):
          """
          Forget training for label 'label_name'
          """
          self._bayes.pop(label_name)
          baye_dir = self._get_baye_dir(label_name)
          logger.info("Deleting label training {} : {}".format(
              label_name, baye_dir
          ))
          rm_rf(baye_dir)