ash: Eliminate PointerWatcherDelegate

ash/sysui/shell_delegate_mus.cc

Index: ash/sysui/shell_delegate_mus.cc
diff --git a/ash/sysui/shell_delegate_mus.cc b/ash/sysui/shell_delegate_mus.cc
index 68a99c77f41cee27af5fb65aa96b39e3c5df8dcb..a93abd68c4e3188453bc2f863b4feef408eef1bd 100644
--- a/ash/sysui/shell_delegate_mus.cc
+++ b/ash/sysui/shell_delegate_mus.cc
@@ -12,7 +12,6 @@
 #include "ash/common/system/tray/default_system_tray_delegate.h"
 #include "ash/sysui/app_list_presenter_mus.h"
 #include "ash/sysui/context_menu_mus.h"
-#include "ash/sysui/pointer_watcher_delegate_mus.h"
 #include "ash/sysui/shelf_delegate_mus.h"
 #include "ash/sysui/user_wallpaper_delegate_mus.h"
 #include "base/memory/ptr_util.h"
@@ -201,11 +200,6 @@ std::unique_ptr<PaletteDelegate> ShellDelegateMus::CreatePaletteDelegate() {
   return nullptr;
 }
 
-std::unique_ptr<PointerWatcherDelegate>
-ShellDelegateMus::CreatePointerWatcherDelegate() {
-  return base::WrapUnique(new PointerWatcherDelegateMus);
-}
-
 ui::MenuModel* ShellDelegateMus::CreateContextMenu(WmShelf* wm_shelf,
                                                    const ShelfItem* item) {
   return new ContextMenuMus(wm_shelf);