code: def delete_repository_tag(self, project_id, tag_name):
          
          return self.delete('/projects/{project_id}/repository/tags/{tag_name}'.format(
              project_id=project_id, tag_name=tag_name))
docs: Deletes a tag of a repository with given name.
  
          :param project_id: The ID of a project
          :param tag_name: The name of a tag
          :return: Dictionary containing delete tag
          :raise: HttpError: If invalid response returned