Drop unnecessary override of OnWindowBoundsChanged in NativeWidgetMus::MusWindowObserver

ui/views/mus/native_widget_mus.cc

Index: ui/views/mus/native_widget_mus.cc
diff --git a/ui/views/mus/native_widget_mus.cc b/ui/views/mus/native_widget_mus.cc
index fb2d97cf88155f3ab950f2b71863f3233c517d8f..5582d54b102a3427b5b5c23a04f88e46908301c5 100644
--- a/ui/views/mus/native_widget_mus.cc
+++ b/ui/views/mus/native_widget_mus.cc
@@ -363,11 +363,6 @@ class NativeWidgetMus::MusWindowObserver : public mus::WindowObserver {
   void OnWindowVisibilityChanged(mus::Window* window) override {
     native_widget_mus_->OnMusWindowVisibilityChanged(window);
   }
-  void OnWindowBoundsChanged(mus::Window* window,
-                             const gfx::Rect& old_bounds,
-                             const gfx::Rect& new_bounds) override {
-    platform_window_delegate()->OnBoundsChanged(new_bounds);
-  }
   void OnWindowPredefinedCursorChanged(mus::Window* window,
                                        mus::mojom::Cursor cursor) override {
     DCHECK_EQ(window, mus_window());