Disable PgUp and PgDn keys with xkb
 

Hi guys,

I'm trying to remap my PgUp and PgDn keys to nothing (thus disabling them). There are supposed to be a couple of ways to do this, but the only permanent one for ubuntu 14.04 seems to be using xkb

Now, I figured out how to remap my capslock to esc using xkb with
This works perfectly (AND permamently), so this seems the way to go for my goal.
I'm trying to figure out the xkb option for disabling PgUp and PgDn and google is just not helping me out here. Can anyone here help me out? Thanks!