grunt: remove Kernel-* libraries since they are included by default
grunt: remove Kernel-* libraries since they are included by default

adrian-castravete/amber,amber-smalltalk/amber,adrian-castravete/amber,matthias-springer/amber-athens,amber-smalltalk/amber,matthias-springer/amber-athens,adrian-castravete/amber,amber-smalltalk/amber,matthias-springer/amber-athens