Delete dead code.

This API has never been used or exposed, time for it to go away.

Change-Id: Ie199ed0731d0a620d6608b2adbea1083f87276cd

Author: Jeff Brown

core/java/android/database/AbstractCursor.java

@@ -284,23 +284,6 @@ public void unregisterContentObserver(ContentObserver observer) {
         }
     }
 
-    /**
-     * This is hidden until the data set change model has been re-evaluated.
-     * @hide
-     */
-    protected void notifyDataSetChange() {
-        mDataSetObservable.notifyChanged();
-    }
-
-    /**
-     * This is hidden until the data set change model has been re-evaluated.
-     * @hide
-     */
-    protected DataSetObservable getDataSetObservable() {
-        return mDataSetObservable;
-
-    }
-
     public void registerDataSetObserver(DataSetObserver observer) {
         mDataSetObservable.registerObserver(observer);
     }