There's no way to remove them as they are part of the model's geometry. MUA just ignores MOST of those entries - AFAIK, only three models actually suffer from them (Bishop, Ultimate Magneto (helmeted version is already in MUAPC, but helmetless isn't) and Mercenary).
Equally, MUA models imported into XML2 will NOT have them, which will make them 'fall out' of the style somewhat.
Sometimes, you guys credit me far more than I'm actually worth XD