It isn't; they specifically have said it will be retained. They aren't too specific but I think what they mean is all the Framework and App support for it will be gone. But as far as keeping a lot of self contained games and wine running I think it'll likely continue to work fine.
I’d really be surprised if they broke codeweavers’ stuff.
Also who cares if the wine exe itself can run as x86? Ideally you want something that resembles windows chpe where the loader is native but works with the translator to bridge translated game code to native sys/lib calls.