Seeing some comments here, my two cent is leave it, like you care what a stranger thinks though lol.

If it’s gas, you’ll need a fitter to cap the line, which means there is a fan so a wire would be there as well. You’ll have to rip out next and fix the outside where the fan was.

So you got :

Gas

Electrical

Drywall

Outside siding

Trim

Paint

Oh? And it’s on a corner so you will have a gap with the carpet.