Old vanity unit, what to do with plumbing

I am in the process of turning a bedroom into an office / workshop. The bedroom has an old built in wardrobe with built in sink. As I was ripping out the old wardrobe this evening, it became apparent that I need to do something with the plumbing. Any suggestions or ideas as to what best to do here would be greatly appreciated.

What I'd ideally like to end up with is a clean plastered wall with no pipes whatsoever. I could put shutoff valves on the pipes, but this would mean I would have to build some kind do panel to hide the pipes behind.
I could remove the pipes altogether. Not sure how I would go about this but it might involve cutting the pipes away up in the attic.