footprint of old plugin still present on the site

plugin installation instruction page listed below still contains instruction for old notification plugin.

https://premium.wpmudev.org/project/set-password-on-wordpress-mu-blog-creation/installation/

https://premium.wpmudev.org/project/subscribe-by-email/installation/

contained text is as below:

Update Notifications

Included with every download from WPMU DEV is a file called update-notifications.php
You should make sure that this file is *always* placed in /mu-plugins/
It will communicate to you critical information about plugins and theme updates - including any security alerts!