Removes WmShell::NewWindow()

ash/mus/bridge/wm_shell_mus.h

Index: ash/mus/bridge/wm_shell_mus.h
diff --git a/ash/mus/bridge/wm_shell_mus.h b/ash/mus/bridge/wm_shell_mus.h
index c82a1177012b0852ce8b1c80304f9183d02b35df..dbdb3c43e15c7c8e5281601691e0aac87556bdc2 100644
--- a/ash/mus/bridge/wm_shell_mus.h
+++ b/ash/mus/bridge/wm_shell_mus.h
@@ -58,12 +58,8 @@ class WmShellMus : public WmShell {
   WindowManager* window_manager() { return window_manager_; }
 
   // WmShell:
-  void Initialize(
-      const scoped_refptr<base::SequencedWorkerPool>& pool) override;
   void Shutdown() override;
   bool IsRunningInMash() const override;
-  WmWindow* NewWindow(ui::wm::WindowType window_type,
-                      ui::LayerType layer_type) override;
   WmWindow* GetFocusedWindow() override;
   WmWindow* GetActiveWindow() override;
   WmWindow* GetCaptureWindow() override;