I'm stopping here for today, but yeah, I got pretty far with these. So far I've cleaned out my "to-read-fantasy"-shelf and "to-read-adult"-shelf.
When I started on the fantasy shelf I had around 330 (didn't check exactly) end ended up having only 170 books left.
On the other shelf I didn't remove quite as many. Started on 294 and ended up on 204.
All in all, a productive cleaning of the shelves. I still have four shelves to go through, but that will have to be some other day!