docs: def delete_deploy_key(self, auth, username, repo_name, key_id):
          """
          Remove deploy key for the specified repo.
  
          :param auth.Authentication auth: authentication object
          :param str username: username of owner of repository
          :param str repo_name: the name of the repo
          :param int key_id: the id of the key
          :raises NetworkFailure: if there is an error communicating with the server
          :raises ApiFailure: if the request cannot be serviced
          """
          self.delete("/repos/{u}/{r}/keys/{k}".format(u=username, r=repo_name, k=key_id), auth=auth)