Removed incorrect statement

If I understand [this page](http://emberjs.com/guides/routing/generated-objects/#toc_generated-views-and-templates) correctly, you definitely don't have to manually create a template if it is all-empty; it is done automatically by the framework.

Please proof-read me to verify that I'm not mistaken in this, but I feel that the text I removed here just makes people confused (since its incorrect, AFAICT).