Anti-aliasing usually applies to a 1-pixel wide border. If done properly there is no-reason to do anything bigger/wider.
But IMHO you shouldn't remove anti-aliasing. If you do your editing correctly the anti-aliasing pixels will be processed properly. The first step is usually to remove the background using Color-to-alpha to work with a transparent layer background.
But IMHO you shouldn't remove anti-aliasing. If you do your editing correctly the anti-aliasing pixels will be processed properly. The first step is usually to remove the background using Color-to-alpha to work with a transparent layer background.