Remove comment container skin

Removes the code for this (now unused) container skin:

![screen shot 2014-05-27 at 10 27 53](https://cloud.githubusercontent.com/assets/85783/3092019/62ab067c-e5a4-11e3-8266-070f4213511d.PNG)

![nuke](https://cloud.githubusercontent.com/assets/85783/3092022/793037c8-e5a4-11e3-98b8-df1c688141b2.gif)