cleanup: Remove dead code in launcher_view.

ash/launcher/launcher_view.h

Index: ash/launcher/launcher_view.h
diff --git a/ash/launcher/launcher_view.h b/ash/launcher/launcher_view.h
index f3102adc3e66d0bc587b0d4b7f722c5565ae18e9..3978142699cd1c248199886c8757e91a61106788 100644
--- a/ash/launcher/launcher_view.h
+++ b/ash/launcher/launcher_view.h
@@ -163,9 +163,6 @@ class ASH_EXPORT LauncherView : public views::View,
   // Common setup done for all children.
   void ConfigureChildView(views::View* view);
 
-  // Returns the items whose icons are not shown because they don't fit.
-  void GetOverflowItems(std::vector<LauncherItem>* items);
-
   // Shows the overflow menu.
   void ShowOverflowBubble();