Remove unused Qt5MenuItem::mpVCLMenu

Change-Id: Ia7f28a54f253f0263cc781feb5997bb51bb640b2
Reviewed-on: https://gerrit.libreoffice.org/55193Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

vcl/inc/qt5/Qt5Menu.hxx

@@ -72,7 +72,6 @@ public:
     sal_uInt16 mnId; // Item ID
     MenuItemType mnType; // Item type
     bool mbVisible; // Item visibility.
-    Menu* mpVCLMenu;
     Qt5Menu* mpParentMenu; // The menu into which this menu item is inserted
     Qt5Menu* mpSubMenu; // Submenu of this item (if defined)
 };

vcl/qt5/Qt5Menu.cxx

@@ -193,7 +193,6 @@ void Qt5Menu::NativeItemText(OUString& rItemText) { rItemText = rItemText.replac
 Qt5MenuItem::Qt5MenuItem(const SalItemParams* pItemData)
     : mnId(pItemData->nId)
     , mnType(pItemData->eType)
-    , mpVCLMenu(pItemData->pMenu)
     , mpParentMenu(nullptr)
     , mpSubMenu(nullptr)
 {