Issue #1751 -- Remove cocoa and uikit widget support code

widget/cocoa/nsPIWidgetCocoa.idl

@@ -1,37 +0,0 @@
-/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#include "nsISupports.idl"
-
-interface nsIWidget;
-
-[ptr] native NSWindowPtr(NSWindow);
-
-//
-// nsPIWidgetCocoa
-//
-// A private interface (unfrozen, private to the widget implementation) that
-// gives us access to some extra features on a widget/window.
-//
-[uuid(f75ff69e-3a51-419e-bd29-042f804bc2ed)]
-interface nsPIWidgetCocoa : nsISupports
-{
-  void SendSetZLevelEvent();
-
-  // Find the displayed child sheet (if aShown) or a child sheet that
-  // wants to be displayed (if !aShown)
-  nsIWidget GetChildSheet(in boolean aShown);
-  
-  // Get the parent widget (if any) StandardCreate() was called with.
-  nsIWidget GetRealParent();
-  
-  // If the object implementing this interface is a sheet, this will return the
-  // native NSWindow it is attached to
-  readonly attribute NSWindowPtr sheetWindowParent;
-
-  // True if window is a sheet
-  readonly attribute boolean isSheet;
-  
-}; // nsPIWidgetCocoa