How do I remove the updates notification ad?

Clearly I am well aware of the wpmudev dashboard/updates plugin (and everything else here) but I have it disabled on this site because it was (in conjunction with all the other plugins and multisite itself) causing internal server errors and ram allocation errors (yeah I know my hosting is mostly to blame, and I'm fixing it asap) but how do I make the little admin warning message at the top that says:
"Easily get updates, support, and one-click WPMU DEV plugin/theme installations right from in your dashboard - install the free WPMU DEV Dashboard plugin. (find out more)"