Remove unused settings constants from the SDK (framework).

The settings constants for various volumes do nothing and are
used by nothing since API version 2. These are however backed
up in the cloud which is a waste of resource. This change
removes these constants from the SDK while keeping them hidden
to avoid breaking released apps and also prevents unnecessary
backup.

Change-Id: I2e91863115f5a4b997a14f8d0f57b4dc9689cfab
diff --git a/api/removed.txt b/api/removed.txt
index 8668a77..1b209a9 100644
--- a/api/removed.txt
+++ b/api/removed.txt
@@ -34,6 +34,22 @@
 
 }
 
+package android.provider {
+
+  public static final class Settings.System extends android.provider.Settings.NameValueTable {
+    field public static final java.lang.String APPEND_FOR_LAST_AUDIBLE = "_last_audible";
+    field public static final java.lang.String VOLUME_ALARM = "volume_alarm";
+    field public static final java.lang.String VOLUME_BLUETOOTH_SCO = "volume_bluetooth_sco";
+    field public static final java.lang.String VOLUME_MUSIC = "volume_music";
+    field public static final java.lang.String VOLUME_NOTIFICATION = "volume_notification";
+    field public static final java.lang.String VOLUME_RING = "volume_ring";
+    field public static final java.lang.String[] VOLUME_SETTINGS;
+    field public static final java.lang.String VOLUME_SYSTEM = "volume_system";
+    field public static final java.lang.String VOLUME_VOICE = "volume_voice";
+  }
+
+}
+
 package android.text.format {
 
   public class DateFormat {