FIX: Wizard does not include discourse-shims

This allowed tests to pass even when wizard was broken, which is
obviously very bad.

app/assets/javascripts/wizard/test/test_helper.js

@@ -12,7 +12,6 @@
 //= require ember-template-compiler
 //= require qunit/qunit/qunit
 //= require ember-qunit
-//= require discourse-shims
 //= require wizard-application
 //= require wizard-vendor
 //= require helpers/assertions