>>1024700PRIVYET, S.T.A.L.K.E.R.
No, but seriously, things you don't need or need to replace:
Get rid of crowbar
Replace shovel with e-tool
Get rid of glow sticks. You already have a flashlight.
Get rid of military helmet.
Things you shouldn't get:
Canned food. Water is heavy
2 Hunting knives. You only need 1 as long as you make sure not to lose it.
Gasmask. You're not in Syria, so being gassed isn't gonna be an issue.
Things you should get:
Ground pad. Unless your sleeping bag is 2" thick with your body weight pressing on it, this is vital.
Compass. Not necessary, but good to have just in case.
Water filtration tablets and/or lifestraw. Water is priority #1.
Alcohol stove. Again, not necessary, but very nice to have. I recommend Trangia because anything alcohol based will work as fuel.
Bolt. You know why you need this.