upgrade k12.04 to K14.04 using ubuntu-tweak

Its been a long time since I have asked for help!
I have recently upgraded my K12.04 LTS to K14.04 LTS and learning my way
around,
but when I did the upgrade I carried over all my old Linux-Pae , and
wondering if I am
able to remove(clean) thru Ubuntu-Tweak(computer Janitor), see attached,
as I only want to keep about 5 old ones?

Ray
Still require an asnwer