Yeah, it's still in the code, just the projectile got removed. (Which I assume the Shuriken bomb mechanics were reused for Mortimer's Freeze 2nd phase)
Its actually a LevelProperties pattern string is what calls in this projectile spawn. (If you look in "SallyStagePlayLevelSally" script/class and look of where it determines the spawn of the projectile and look at what letter it spawns it in, that specific letter is what needs to be edited in for the pattern that determines the spawn of it)