code: public void unsubscribeInBackground(final AVLiveQuerySubscribeCallback callback) {
      Map<String, Object> map = new HashMap<>();
      map.put(SUBSCRIBE_ID, getSubscribeId());
      map.put(QUERY_ID, queryId);
  
      RealtimeClient.getInstance().unsubscribeLiveQuery(map).subscribe(new Observer<JSONObject>() {
        @Override
        public void onSubscribe(Disposable disposable) {
        }
  
        @Override
        public void onNext(JSONObject jsonObject) {
          liveQuerySet.remove(AVLiveQuery.this);
          queryId = "";
          if (null != callback) {
            callback.internalDone(null);
          }
        }
  
        @Override
        public void onError(Throwable throwable) {
          if (null != callback) {
            callback.internalDone(new AVException(throwable));
          }
        }
  
        @Override
        public void onComplete() {
        }
      });
    }
docs: unsubscribe the query
  @param callback