code: public void serviceName_topic_topicId_DELETE(String serviceName, String topicId) throws IOException {
  		String qPath = "/dbaas/queue/{serviceName}/topic/{topicId}";
  		StringBuilder sb = path(qPath, serviceName, topicId);
  		exec(qPath, "DELETE", sb.toString(), null);
  	}
docs: Delete a topic
  
  REST: DELETE /dbaas/queue/{serviceName}/topic/{topicId}
  @param serviceName [required] Application ID
  @param topicId [required] Topic ID
  
  API beta