Can the bullet be removed from the casing of the 30.06 bullet by hand?

By hand I doubt it, with a pair of pliers yes. Fortunately it's a long casing and your probably can do it. The bullet will be junk when your done and I'd strongly recommend you NOT put the case in a vise or anything just hold it with you hand and wiggle it back and forth. There's nothing unsafe about pulling a bullet out of a case this way unless you wack yourself in the eye when it comes loose ;)

A bullet puller is best but in a pinch not sure why you'd do this but it'll work.