Remove wiki-screen.css

![Happy tears](https://cloud.githubusercontent.com/assets/933396/2932748/6cf6bb64-d7b5-11e3-9a5e-e43d446d1bc0.gif)

![Happy tears](https://cloud.githubusercontent.com/assets/933396/2932782/143332b8-d7b6-11e3-9aec-fd7fbc5e9131.gif)

![Happy tears](https://cloud.githubusercontent.com/assets/933396/2932794/3901c514-d7b6-11e3-9172-68913a4248ca.gif)