code: func (x *XC) RemoveKey(id string) error {
  	if x.secring.Contains(id) {
  		if err := x.secring.Remove(id); err != nil {
  			return err
  		}
  		return x.secring.Save()
  	}
  	if x.pubring.Contains(id) {
  		if err := x.pubring.Remove(id); err != nil {
  			return err
  		}
  		return x.pubring.Save()
  	}
  	return fmt.Errorf("not found")
  }
docs: // RemoveKey removes a single key from the keyring