How do I install the tag feed plugin completely?

A year or so ago I deleted the tag posts plugin but it still shows up in the WPMU DEV section. I show the "installed version" as 3.1.1 and the "latest version" as 1.0.2.

Tag-feed.php has been removed from wp-content, what else can I do to fully remove this plugin? I suspect this is might be the cause of daily notices that my WPMU Dev plugins have a critical update when I'm already up to date. The issue is fixed for a few minutes when I refresh whatever page I'm on in dashboard....