In reply to nniff: I'm guessing it was part of the whole Crocker clean-up operation. By cleaning the top pitch, and negotiating the access to walk off, it made the ab bolts a second best (and therefore unnecessary) option.
However, I noticed while doing Puma that there is still an ab station in place about 30ft to the left of the 1st belay of King Kong at the top of the 1st/2nd (not sure which) pitches on Kaiser Wall.
Ben