Revert "quick settings: power menu tile"

This reverts commit 88215e7ee9c09493198f5999dc87e714256833c9.

Conflicts:
	packages/SystemUI/res/values/ras_strings.xml
	packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickSettings.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickSettingsModel.java