Remove 'force overflow button' logic.

It's force-enabled now anyway.

Change-Id: Ib4489456d40650316d45865fedfae9c3c960b81e
Merge "Remove 'force overflow button' logic." into cm-11.0
Merge remote-tracking branch 'github/cm-11.0' into cm11

Conflicts:
	core/java/android/provider/Settings.java