Remove stat data transitioning code

It looks like the only two functions that call *setStat* with a non-normalized path are *create* and *mkdir* (because they both immediately call *createInternal*, which does the normalization). And no functions call *removeStat* with a non-normalized path.

So instead of adding normalization to *setStat* and *removeStat*, I would make *create* and *mkdir* normalize the path and then remove normalization from *createInternal*. Then the entire module would be consistent about always normalizing a path in a public function and never normalizing it in a private one (because it's always normalized by then), which'll make the module's code easier to reason about.