They're just so many years outdated, that they're pretty much unusable which is probably why you're not aware of them being there. ;)

This patch is to update the NURBS capabilities in Blender, so the "artistic vision" objects people create can then be turned into real life objects via industry standard processes (eg CNC machining).

If you personally don't want to use the NURBS pieces, then feel free to ignore them. But please don't block other people from doing so. :)