store/memory.go
func (ms *MemoryStore) Remove(words ...string) error {
	if len(words) == 0 {
		return nil
	}
	for i, l := 0, len(words); i < l; i++ {
		ms.dataStore.Remove(words[i])
	}
	atomic.AddUint64(&ms.version, 1)
	return nil
}
func (ms *MemoryStore) Remove(words ...string) error {
	if len(words) == 0 {
		return nil
	}
	for i, l := 0, len(words); i < l; i++ {
		ms.dataStore.Remove(words[i])
	}
	atomic.AddUint64(&ms.version, 1)
	return nil
}
// Remove Remove