I know WPMUDEV has a plug-in for this, but I'm wanting

I know WPMUDEV has a plug-in for this, but I’m wanting to use the theme-my-login plugin and just hide the menu that appears on the front end to logged-in users (the one that appears fixed at the top and says “Howdy, xxx” and all that). I’d prefer not to use a whole plug-in for just that functionality.

So, is there a hook or filter I can use to disable it entirely if the logged in person is just a subscriber (or alternatively not the admin)?

I’d prefer to disable it rather than hide it as that will save a little time on the download.