This mod removes the CAVE_ADAPT tag from dwarves and does nothing else.

Cave Adaptation currently bestows no benefit, it just makes it annoying to return to the surface for any reason after two years of being underground as a dwarf. It's a small naggy thing and while DF has lots of really fun and engaging "small naggy things" for me this isn't one of them. So, I removed it and thought I'd share the fruits of my labors.

It's on the Steam Workshop here: https://steamcommunity.com/sharedfiles/filedetails/?id=3635226183