code: func DeleteDeviceGatewayRXInfoSet(p *redis.Pool, devEUI lorawan.EUI64) error {
  	c := p.Get()
  	defer c.Close()
  
  	val, err := redis.Int(c.Do("DEL", fmt.Sprintf(deviceGatewayRXInfoSetKeyTempl, devEUI)))
  	if err != nil {
  		return errors.Wrap(err, "delete error")
  	}
  	if val == 0 {
  		return ErrDoesNotExist
  	}
  	log.WithFields(log.Fields{
  		"dev_eui": devEUI,
  	}).Info("device gateway rx-info meta-data deleted")
  	return nil
  }
docs: // DeleteDeviceGatewayRXInfoSet deletes the device gateway rx-info meta-data
  // for the given Device EUI.