removed stuff Ember.setupForTesting does automatically

Router's location gets set to 'none' according to the documentation ( [here](http://emberjs.com/guides/testing/integration/))

```Ember.testing``` gets set [here](https://github.com/emberjs/ember.js/blob/76eb6c26ab7c194701e3f4caae47f727fff20c88/packages_es6/ember-testing/lib/setup_for_testing.js#L34)