code: func (q *UniqueQueue) RemoveFromQueue(value string) bool {
  	q.lock.Lock()
  	defer q.lock.Unlock()
  
  	if !q.set.Has(value) {
  		return false
  	}
  	for i, val := range q.queue {
  		if val.Value == value {
  			heap.Remove(&q.queue, i)
  			return true
  		}
  	}
  	return false
  }
docs: // RemoveFromQueue the value from the queue, but keeps it in the set,
  // so it won't be added second time. Returns true if something was
  // removed.