Deleting multiple image points at once

Hey everybody - I have minor snafu I'm wondering about:

I added a couple of image points to 'all animations' on one of my sprites, and then later realized that I needed to name them differently.

The 'Undo' function in C2 doesn't get rid of the new image points though - and as far as I know, there's not a way to delete them in bulk, other than going through every frame of every animation and manually deleting them.

It seems weird to me that there's a quick way to add image points to every frame of every animation, but not a quick way to delete them all (either by name, or index, or something). Does anybody know of an easy way to do that?

Unfortunately it seems to be one of those things that wasn't considered needed. You can batch add them easily but you will need to sit down with a large cup of coffee to undo it.