When i ran
sudo apt-get remove overlay-scrollbar
the first time it showed some liboverlay-scrollbar items that were not in use and could be removed so I ran
which removed those things. So it indicated.
sudo apt-get autoclean
I just now ran
and that removed some other stuff. So, don't know what I missed before now, but I got it now. I know it wasn't the suggestions in the post, however, ajgreeny's post made me think of it.
sudo apt-get remove overlay*
By the way, Ubuntu Tweak's website says it is for 11.10 and earlier.
Thanks to all who replied.