Bye bye workspace screens table

Removing a separate table for workspace screens. List of screens are
automatically parsed using the items in the favorites DB. Order of the
screen based on the screen id and rearranging screens is no longer
supported. In case the screens need to be rearranged, all the items
in the favorites db will need to be updated with new screen ids.

This makes backing up the DB (in the same database) easier as only
one table needs to be duplicates.

Change-Id: I8ba947a898f637d780e2f49925e78604263126e8
diff --git a/src/com/android/launcher3/LauncherSettings.java b/src/com/android/launcher3/LauncherSettings.java
index 0b12b15..79c8208 100644
--- a/src/com/android/launcher3/LauncherSettings.java
+++ b/src/com/android/launcher3/LauncherSettings.java
@@ -26,16 +26,17 @@
  * Settings related utilities.
  */
 public class LauncherSettings {
-    /** Columns required on table staht will be subject to backup and restore. */
-    static interface ChangeLogColumns extends BaseColumns {
+
+    /**
+     * Favorites.
+     */
+    public static final class Favorites implements BaseColumns {
         /**
          * The time of the last update to this row.
          * <P>Type: INTEGER</P>
          */
         public static final String MODIFIED = "modified";
-    }
 
-    static public interface BaseLauncherColumns extends ChangeLogColumns {
         /**
          * Descriptive name of the gesture that can be displayed to the user.
          * <P>Type: TEXT</P>
@@ -84,34 +85,6 @@
          * <P>Type: BLOB</P>
          */
         public static final String ICON = "icon";
-    }
-
-    /**
-     * Workspace Screens.
-     *
-     * Tracks the order of workspace screens.
-     */
-    public static final class WorkspaceScreens implements ChangeLogColumns {
-
-        public static final String TABLE_NAME = "workspaceScreens";
-
-        /**
-         * The content:// style URL for this table
-         */
-        public static final Uri CONTENT_URI = Uri.parse("content://" +
-                LauncherProvider.AUTHORITY + "/" + TABLE_NAME);
-
-        /**
-         * The rank of this screen -- ie. how it is ordered relative to the other screens.
-         * <P>Type: INTEGER</P>
-         */
-        public static final String SCREEN_RANK = "screenRank";
-    }
-
-    /**
-     * Favorites.
-     */
-    public static final class Favorites implements BaseLauncherColumns {
 
         public static final String TABLE_NAME = "favorites";