code: def delete_metadata(self, resource, keys):
          
          self.metadata_service.set_auth(self._token_metadata)
          self.metadata_service.delete(resource, keys)
docs: Deletes the given key-value pairs associated with the given resource.
  
          Will attempt to delete all key-value pairs even if some fail.
  
          Args:
              resource (intern.resource.boss.BossResource)
              keys (list)
  
          Raises:
              HTTPErrorList on failure.