Is this something that shows because the RM is already on your server or is it just because you have that add-on associated with your license? I have a few licenses and I don't see that notice on either of my forums so I'm assuming one of the above is true.
If it's the latter, I'd be for removing the notice too, or at the very least adding an option to dismiss it. It'd be pretty annoying to see a notice for an add-on you have no intentions on installing.
However, if it's showing up because the add-on is already on the server, I can see why the notice should be there. You wouldn't want to accidentally install a lesser version of the add-on that's incompatible with your forum. Also, if this is the case, you could get rid of the notice by simply removing the add-on from your server if you don't plan to use it.