Remove MOZ_WIDGET_GONK [2/2]

Tag #288

xpfe/appshell/nsAppShellService.cpp

@@ -732,13 +732,6 @@ nsAppShellService::JustCreateTopWindow(nsIXULWindow *aParent,
     widgetInitData.mRTL = isRTL;
   }
 
-#ifdef MOZ_WIDGET_GONK
-  // B2G multi-screen support. Screen ID is for differentiating screens of
-  // windows, and due to the hardware limitation, it is platform-specific for
-  // now, which align with the value of display type defined in HWC.
-  widgetInitData.mScreenId = mScreenId;
-#endif
-
   nsresult rv = window->Initialize(parent, center ? aParent : nullptr,
                                    aUrl, aInitialWidth, aInitialHeight,
                                    aIsHiddenWindow, aOpeningTab,