sfall is available in sourceforge and still being maintained, whoever needs it can get it there
ddraw.dll from fallout works for both with wine

Why would GOG do something with a game that was removed from the store?
Removing sfall, will only make the users pissed, not a good idea!
Sure, you can get the latest version in sourceforge, but if this is the only reason you can think to remove it, it's not gonna happen. You're free to delete, change the version, etc, in your folder. You're nuts if you think they'll remove files from a game for no good reason.