FYI, I believe once they appear, they won't go away even if you remove apps. You'd have to do a reset to remove them.
EDIT: 45, as noted above ^
That is driving me nuts at the moment. I don't have a lot of apps and find it a lot faster to scroll through without the index. But now that I hit the limit and got it, there's no way to get rid of it....
...or is there?