Can't get rid of traits and skills for gallery sim.

Did you save her to your library? Start a new game. Just pull her out of the library into CAS and edit away.

Mylita

edited to add: You should be able to change anything you like in CAS, if you initially saved her to the your library. If you only saved her after she was already in the game, it will be more difficult. I think you will need to use the 'cas.fulleditmode' cheat, although I have had trouble getting that cheat to work.