Deleted unnecessary code in the app/client/index
Deleted unnecessary code in the app/client/index

This code only is necessary when you don't use react-router:
```javascript
  // Supply a function that can be called
  // to resolve the file that was rendered.
  viewResolver: function(viewName) {
    return require('../shared/components/' + viewName);
  }
```
nnnnathann/universal-js-boilerplate,carlosazaustre/universal-js-boilerplate