Cleanup NettyClientStreamRpc#replies empty queue

org.apache.ratis.netty.client.NettyClientStreamRpc#replies

private final ConcurrentMap<ClientInvocationId, Queue<CompletableFuture<DataStreamReply>>> replies =
      new ConcurrentHashMap<>();

When all data for a streamID has been sent, is it necessary to clear the queue from the map？

I would implement a ExpiringMap. If you don't use it for a long time or Queue.size is 0, I delete it from the Map.