Remove a back button-breaking hack in .compact

Scrolling the document down by a pixel used to hide the navigation bar in iOS Safari. It doesn't do anything in newer versions of iOS Safari, but it does make iOS Chrome lose its scroll position when you go back to a .compact page.

This patch should be pretty small and safe but let me know if I should make a bug in [/r/bugs](http://www.reddit.com/r/bugs) for it.