removing unnecessary/dead code

Change-Id: I46d5b5fbee97b6895fb4f1b61627fda6f8568256
diff --git a/src/com/android/launcher2/LauncherAppWidgetHostView.java b/src/com/android/launcher2/LauncherAppWidgetHostView.java
index 670c8b6..7c3b993 100644
--- a/src/com/android/launcher2/LauncherAppWidgetHostView.java
+++ b/src/com/android/launcher2/LauncherAppWidgetHostView.java
@@ -30,12 +30,10 @@
 /**
  * {@inheritDoc}
  */
-public class LauncherAppWidgetHostView extends AppWidgetHostView
-    implements VisibilityChangedBroadcaster {
+public class LauncherAppWidgetHostView extends AppWidgetHostView {
     private boolean mHasPerformedLongPress;
     private CheckForLongPress mPendingCheckForLongPress;
     private LayoutInflater mInflater;
-    private VisibilityChangedListener mOnVisibilityChangedListener;
 
     public LauncherAppWidgetHostView(Context context) {
         super(context);
@@ -120,18 +118,6 @@
         }
     }
 
-    public void setVisibilityChangedListener(VisibilityChangedListener listener) {
-        mOnVisibilityChangedListener = listener;
-    }
-
-    @Override
-    protected void onVisibilityChanged(View changedView, int visibility) {
-        if (mOnVisibilityChangedListener != null) {
-            mOnVisibilityChangedListener.receiveVisibilityChangedMessage(this);
-        }
-        super.onVisibilityChanged(changedView, visibility);
-    }
-
     @Override
     public int getDescendantFocusability() {
         return ViewGroup.FOCUS_BLOCK_DESCENDANTS;