So back in 2011, I was a member of the 100 Books in 2011 member group. I was subscribed to updates, so it showed up in the group section of my user CP. The group was deleted once the year was over, but it's still listed in my CP and I can't see any way to get rid of it.
Not sure why it took all this time for it to start bugging me, but it is, so please help me make it go away!