Don't remove the abv, its what lets air around your supercharger and into your engine when the SC is not spinning. There is also absolutely no point to removing it.
[EDIT - Actually I was wrong, I just read that some people have removed it with no problems. Don't understand how it works, but apparently it does]
As for other stuff, I say nothing unless it needs it. But if the entire engine is coming out timing belt and water pump is a good idea.