I'd give up playing the Violin haha! Without vomiting, I'd only fear uhm... ahh... not much else.
As some of us know, Vomiting is a learnt response and rarely actually saves lives. By the time your body vomits -- unless given an emetic -- you most likely absorbed enough poison to be considered dangerous. With enough awareness, vomiting can be ignored (albeit food born illnesses, but that can still be avoided). What I'm saying is, giving up the ability to vomit wouldn't likely bring you into some sort of dangerous outcome with enough awareness.