Hide "Posted In" on certain pages/posts

I’m running a community-based WordPress site and on our forums and a couple of other pages, it says “Posted in” at the top, but of course it’s not in a category because it’s a main page.

I’d like some way to hide this from view. Does anyone know of an easy fix? I’d like it to still say “Posted in: <categories>” on the posts themselves, just not on the pages.

Any help is greatly appreciated!