code: func (s *HTTPServer) preparedQueryDelete(id string, resp http.ResponseWriter, req *http.Request) (interface{}, error) {
  	args := structs.PreparedQueryRequest{
  		Op: structs.PreparedQueryDelete,
  		Query: &structs.PreparedQuery{
  			ID: id,
  		},
  	}
  	s.parseDC(req, &args.Datacenter)
  	s.parseToken(req, &args.Token)
  
  	var reply string
  	if err := s.agent.RPC("PreparedQuery.Apply", &args, &reply); err != nil {
  		return nil, err
  	}
  	return nil, nil
  }
docs: // preparedQueryDelete deletes prepared query.