Fix some rails issues

Again based on PullReview, a few minor fixes:

* remove empty helpers
* use the simplified version of render
`#` :rocket: :boom:

R.I.P.

![kitty_is_sad1](https://cloud.githubusercontent.com/assets/193936/5324854/46e86190-7ce0-11e4-81d4-567f8e9df713.jpg)