Deleting Useless Wiring

[Komet]

So I'm in the middle of rewiring my car / troubleshooting the lights, and I wanted to know if I can just remove that diagnostic block and all the wiring associated in the back, as well as the fasten seat belts light/sensor deal without any problems. It seems to me I've got a bunch of cluttered wires that aren't doing anything at all and I'd much prefer it if they left, but I don't want to open any circuits and have to track down some silly mistake because of it.

Thanks for any help!