func (c *LRU[K, V]) removeOldest() {
	if ent := c.evictList.Back(); ent != nil {
		c.removeElement(ent)
	}
}

// removeElement is used to remove a given list element from the cache. Has to be called with lock!
func (c *LRU[K, V]) removeElement(e *Entry[K, V]) {
	c.evictList.Remove(e)
	delete(c.items, e.Key)
	c.removeFromBucket(e)
	if c.onEvict != nil {