How to disable Lerpz jetpack effect?

Hi, I'm modificating Lerpz tutorial, and I have added a new item, this item is used for active the jetpack effect (I mean, the effect and that holding the space button makes it to "levitate" a little bit). So now, I want to know what lines Should I comment or modify on Third Person Controller to achieve it. Lot of thanks

Have commented some lines and problem finished