code: func (idx *UniqueIndex) RemoveID(id []byte) error {
  	c := idx.IndexBucket.Cursor()
  
  	for val, ident := c.First(); val != nil; val, ident = c.Next() {
  		if bytes.Equal(ident, id) {
  			return idx.Remove(val)
  		}
  	}
  	return nil
  }
docs: // RemoveID removes an ID from the unique index