From the outside, Hansel & Gretel: Witch Hunters looks an awful lot like the cousin of Abraham Lincoln: Vampire Hunter and its vulturous novelized kin. But Tommy Wirkola isn’t trying to mine wit out of genre trash based off of pillars of classic literature or the travails of American history; he just wants to make Sam Raimi flicks. Admittedly, the two transgressions are more or less the same thing- cribbing is cribbing- but watching the unabashed stupidity of Hansel & Gretel unfold feels akin to the experience of watching an eight-year-old in the full throes of a massive sugar rush as they haphazardly recreate scenes from their favorite movie using whatever…