Method remove

python/0706-design-hashmap.py:31–36

(self, key: int)

        return -1

    def remove(self, key: int) -> None:
        cur = self.map[self.hashcode(key)]
        while cur.next and cur.next.key != key:
            cur = cur.next
        if cur and cur.next:
            cur.next = cur.next.next