If so, that should be added to the changelog.
I can't keep track of every single change Asus does upstream, I have no documentation on these. They most likely changed the build process to skip some of these outdated modules, so it was merged in along with the rest of the GPL.
I can look into re-adding them, but ultimately it will eventually stop working for pretty much everyone, as CIFS support is gradually getting removed from other operating systems.