So cssUndefinedClasses wasn't ideal since there were a lot of duplicate style classes, and it wouldn't remove them unless every definition was gone. For example, several pages would have a defined "c1" class, but in some cases c1 would style the text's color to blue (something I intended to keep, albeit defined in a common stylesheet), while in others it would set the left margin to 0em (something I wanted gone).
Anyway, I had to do a lot of the work manually anyway, but cssUndefinedClasses sure helped a lot with the final cleanup steps.
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