If you remove the big nut the hubs come off also and youwont be able to bolt the tires on the truck.. You cant make a 4x4 into a 2wd like that.R. Remove both CV Shafts- One big nut in the center of each rotor- they come right off with an air gun..
You might have to buy new 2wd spindles and rotors as well, but I don't think you will.
The best thing to do is just remove the front driveshaft.
You cant remove the front axle shafts. If you want a 2wd go sell or trade yours for a 2wd