Why did they kill Kutner off on House? He was like the only good "lackey" left! stupid ratings graber.?

Was he starring in an upcoming movie or t.v. series? with the exception of omar epps and obviously hugh laurie, he's been in the most movies and t.v. shows. So is that the case....or did Fox just suddenly decide to axe the indian hindu (s...lol). Why couldn't they kill off big nose taub? geeeez.