code: func (a *Aliases) Del(alias string) error {
  	a.mtx.Lock()
  	defer a.mtx.Unlock()
  
  	return a.db.Update(func(tx *bolt.Tx) error {
  		bucket := tx.Bucket([]byte(bucketName))
  		return bucket.Delete([]byte(alias))
  	})
  }
docs: // Del removes an alias from the store based on the alias string.