They're not that expensive, just leave them behind, add them as a perk "Pre-outfitted for WiFi"
Barring that, remove the mount, shove the cable back through the hole, and get a dab of drywall mud to patch it and paint over it.
All or nothing, you either do the full repair, or you leave them as is. (Personally I'd leave them as the time it takes to repair the mount points is worth more to me than the cost of a new Ubiquiti WAP.)
I use it almost daily. Spent a lot of time uploading and downloading large files from work.