use native path

src/util/fs.js

@@ -14,21 +14,7 @@ function statFileAsync(path) {
     });
 };
 
-function pathResolve(root, path) {
-    if (path[0] == '/') return path;
-
-    var arr = root.split('/').concat(path.split('/'));
-    var result = [];
-    arr.forEach(function(slug) {
-        if (slug == '..') result.pop();
-        else if (!slug || slug == '.');
-        else result.push(slug);
-    });
-    return '/' + result.join('/');
-}
-
 module.exports = {
     readFileAsync,
-    pathResolve,
     statFileAsync
 };