Remove lockscreen blur

This reverts commit cc54901f3eedad3f8fd2bfaae4ee25b5e2f188b8.

Revert "Lockscreen Blur: another fix"

This reverts commit e0f7bd8ef85d6caaf445de01fd4fa1a2c2afec5a.

Revert "Lockscreen Blur (1/2)"

This reverts commit aa67eba2c0a9059dd09d093ca20e315c4d4d9334.

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