Remove remains of `my/foo` structure.

Gruntfile.js

@@ -59,7 +59,7 @@ module.exports = function (grunt) {
 
         amberc: {
             options: {
-                amber_dir: findAmberPath(['../..', '../amber/lang', 'node_modules/@ambers/lang']),
+                amber_dir: findAmberPath(['../amber/lang', 'node_modules/@ambers/lang']),
                 configFile: "config.js"
             },
             all: {