Aren't as essential when bailing is easy and am emergency is unlikely.
Are you taking a baselayer though? Even just a lightweight silk baselayer can add warmth and feel good in camp, but again, not necessary for such a short trip, and if you want to be as light as possible, leave at home.
Also, you *could* trade out the Prolite for NeoAir or a Nightlight from gossamergear.com, but I'm sure you know that already.
In my experience, things you will definitely want: some form of light, a beanie hat, a change of socks, sunscreen, and a minimalist med kit (hydrocortisone cream and advil being the most used items from this, for me).