Remove useless omega-i18n copy task.

omega-target-chromium-extension/grunt/copy.coffee

@@ -11,16 +11,6 @@ module.exports =
   target_self:
     src: 'omega_target_chromium_extension.min.js'
     dest: 'build/js/'
-  i18n:
-    expand: true
-    cwd: '../omega-i18n'
-    src: ['**/*']
-    dest: 'build/_locales/'
-  i18n_zh:
-    expand: true
-    cwd: '../omega-i18n/zh_CN'
-    src: ['**/*']
-    dest: 'build/_locales/zh'
   overlay:
     expand: true
     cwd: 'overlay'