in topic_manager.go [97:107]
func (p *MNSTopicManager) DeleteTopic(topicName string) (err error) {
topicName = strings.TrimSpace(topicName)
if err = checkTopicName(topicName); err != nil {
return
}
_, err = send(p.cli, p.decoder, DELETE, nil, nil, "topics/"+topicName, nil)
return
}