I agree with Roger. Don't get rid of anything for a couple years. It may still be usefull for partnered travel or group travel. And get advise from the UL people here, not the light weight people.
Concentrate on the so-called big three. As Scott said a 24oz or less pack. A 32oz or less sleeping bag and a 32oz or less tent. Generally, to get down to 10-15lb, you need to keep the big three below 2lb each. A tarp tent is a good option, I prefer a tarp with a removable inner net tent. A LOT will depend on where, when and how high you intend to hike. Roger likes tube tents(catipilar/hoop tents.) You may need a free standing tent...kind'a misnomer.
For cook gear, I prefer a SVEA. These are getting hard to find, though. The extra weight is often ofset by packing high density foods, dehydrated stuff. I usually enjoy cooking a good meal at supper. It may just be fuel to you.
Cloths are easy. No extra. An extra set of long johns for sleeping cloths, more to keep the sleeping bag clean than for warmth. A rain jacket, extra pair of socks and a good warm jacket should round things out for anything up to a week or so.
Aquamira and depending on where/when you hike, one or two 1 liter bottles for water.
Weigh everything. If there is a choice, choose the lightest.
My base gear goes about 9-11 pounds, depending where I am headed. Food, water, fuel, bear ball are added in as consumables. (I rarely need the bear ball.)
Deet, permethryn washed cloths, handles most bugs. The net tent handles sleeping at night even in mosquito/black fly season. A cigar makes a good black fly deterant.