Revert "settings: Add dock battery support"

This reverts commit 390f16ade59e1ed517da612f65ff8c9dca1b2bb5.

Conflicts:
	res/values/cm_strings.xml
	res/xml/status_bar.xml

Change-Id: Ic2fceb3b5ea505b42f6c8ea786bc4467a56fe11f