Revert "Bug 907333 - IonMonkey: Add MAssertRange. r=h4writer"

This reverts changeset a559154a056c for oranges with --ion-check-range-analysis.
Bug 903655 - JSOP_GETELEM always needs a type barrier in parallel execution. (r=bhackett)
Bug 906276 - Add attribute to nsIDocShell to disable content retargeting. r=jlebar, sr=biesinger