code: def unset(self, key):
          
          params = {
              'key': key
          }
          return self.client.delete(self._url(), params=params)
docs: Removes the rules config for a given key.
  
          Args:
              key (str): rules config key to remove
  
          See: https://auth0.com/docs/api/management/v2#!/Rules_Configs/delete_rules_configs_by_key