Remove Random Pony from character list

Repro:

1. Go to http://panzi.github.io/Browser-Ponies/
2. Click the "Bookmarks Menu" button
3. Click "Random Pony" about half-way down.

Looks like the character list included the Random Pony by accident on the last pony update.

![bookmarks_-_google_chrome_2014-08-14_18-50-30](https://cloud.githubusercontent.com/assets/6135313/3922298/ed581d84-23c8-11e4-844a-f02a7faa9ccf.png)

*also, not sure about commit 0c766dd, I can't exclude it from the pull request, bleh*