Unless you are a trained MD qualified to do surgery without use of an anesthetic, I suggest you leave the surgery stuff at home. Unless you are one of those unusual persons not incapacitated by severe pain, you won't be able to use it on yourself, and you'll probably get sued if you use it on somebody else!
Your list and my comments (based on a very thorough mountaineering first aid course and yearly updates from my-son-in-law-the-ER-physician):
Scalpel Blades--not unless it's a substitute for your knife
Moleskin--some prefer duct tape, but I use this a lot.
Alcohol Swabs, Iodine Swabs--you don't need both. Don't use iodine on someone else; they might be allergic, like me.
Ibuprofen--Acetamenophin might be better, as gorge_medic points out.
Needle (sewing)--should be big enough to thread dental floss--I hope you're flossing while on the trail; restorative dentistry is extremely expensive, as I well know!
Needle (stitches)--leave home. See gorge_medic's post
Silk Thread #2--Use dental floss for gear repairs; don't try to stitch a wound.
Imodium
Antibiotics--not unless you're qualified to prescribe them
Benadryl
Tweezers--fine point to grab splinters or a tick's head
Hemostat--are you a qualified surgeon?
Scissors--knife works fine for me, but most of us have scissors on our pocket knife.
Magnifying lens--I have to take really strong reading glasses (for the detail on contour maps), so I don't take; otherwise probably a good idea if your closeup vision isn't good.
Gauze bandage roll 4", gauze patch 4x3, gauze patch 2x2--You don't need all this gauze! I take several non-stick 4" pads and a sanitary napkin, by far the best compress for severe bleeding (as recommended by my mountaineering first aid instructor).
Butterfly bandages-can make out of duct tape or regular bandaids. Again, see gorge_medic's post about not closing wounds
Regular bandages--do you mean bandaids? That's what I use the most!
Antibiotic ointment--1 or 2 of the "individual" packets--I take only because I invariably get tiny scratches on my hands which tend to get infected. I don't use it, though, unless actual infection sets in. I get long lectures from my-son-in-law-the-ER-physician about overuse of antibiotics.
After bite wipe--who do you expect to bite you? Don't hike with him!
If for insect bites, a paste of baking soda or the cortisone ointment listed below works fine.
Fingernail clippers--redundant; use scissors or knife.
Medical tape--Try duct tape which you should have anyway for repairs
Ace bandage--Try veterinary wrap instead; it's a
lot lighter--it can also be used to hold bandages on a limb (what vets use it for). Available at any farm store. You can reinforce it on the outside with duct tape if it needs stiffening.
Ziploc bag
Saline Mix packets--if you use a sports drink mix anyway (IMHO a good idea), you don't need these. It should be an electrolyte replacement mix, not just salt!
Hydrocortizone cream--baking soda paste works; I take baking soda anyway as a dentifrice. One individual packet is plenty.
Super glue--If you can stand the pain, but only for tiny cuts/blisters, not for big stuff (see gorge_medic's post)
Items omitted: Duct tape--the universal fix-it item, should be one of the "ten" essentials.
Antifungal ointment
A few antacid tablets
Above all:
A good first aid course, preferably mountaineering first aid! It will teach you to improvise from materials at hand so you don't have to carry all that stuff that there's at most a 0.5% chance of ever needing.
Most places I backpack, somebody is bound to come along within a few hours. I strongly recommend sticking to popular trails or going with an experienced group if you're a beginner. If you're backpacking alone in a location miles off-trail where nobody would come along for many days, you probably should take a Personal Locator Beacon with you.
