code: def delete_fork_relation(self, **kwargs):
          
          path = '/projects/%s/fork' % self.get_id()
          self.manager.gitlab.http_delete(path, **kwargs)
docs: Delete a forked relation between existing projects.
  
          Args:
              **kwargs: Extra options to send to the server (e.g. sudo)
  
          Raises:
              GitlabAuthenticationError: If authentication is not correct
              GitlabDeleteError: If the server failed to perform the request