Notification plugin disable

I just downloaded my first plugin from WPMU and it's great, but I am dissapointed there is an alert that I can't X out of without installing another plugin.

I don’t want to install any unnecessary plugins. I know you want to keep me updated, but I can follow that on my own. To be honest, without trying to step on any toes, but it seems like it's a cheap way for you to continue to advertise to me through my wordpress admin.

How do I disable the update notifications plugin without installing the plugin.

Thanks in advance