@Override
    public void onDeleted(final PluginDO plugin) {
        publish(new PluginChangedEvent(plugin, null, EventTypeEnum.PLUGIN_DELETE, SessionUtil.visitorName()));
    }
on plugin deleted.

@param plugin plugin
shenyu-admin/src/main/java/org/apache/shenyu/admin/service/publish/PluginEventPublisher.java