Why don't you simply deselect "System / BIOS" in the category filter then? And who said that anything else than catver.ini would work w/o issues? It's called "System / Device" and "System / BIOS" because of catver.ini. So either your version of "catver.ini" has to use these strings or not include BIOS- / device-sections at all, or you have to live with the fact that there are unused additional BIOS / device categories.

(Device sets are automatically filtered out because they don't run standalone, but a number of BIOS sets actually do.)

A mind is like a parachute. It doesn't work unless it's open. [Frank Zappa]