At some time I've installed Gnome Shell. After some time of fiddling with it, I've decided that I prefer Unity, so I've uninstalled it. Now the Unity menu is full of strange icons with no descriptions. There's also some duplicates of programs, such as Gimp or Gedit. How do I clean my menu, and possibly my system of all that's left behind by Gnome?
Here's a screenshot:
I'm using 11.10/64. Please let me know if there's more info I can provide.