code: public void removeSubscribers(Subscribers subscribers) throws IOException {
          String url = "queues/" + name + "/subscribers";
          String jsonMessages = gson.toJson(subscribers);
          IronReader reader = client.delete(url, jsonMessages);
          reader.close();
      }
docs: Remove subscribers from Queue. If there is no queue, an EmptyQueueException is thrown.
  @param subscribers The array list of subscribers.
  @throws io.iron.ironmq.HTTPException If the IronMQ service returns a status other than 200 OK.
  @throws java.io.IOException If there is an error accessing the IronMQ server.