xrEngine/device.h: removed duplicate

How did this happen? :D

Author: Xottab-DUTY

src/xrEngine/device.h

@@ -164,7 +164,6 @@ class ENGINE_API CRenderDevice : public CRenderDeviceBase
     void _SetupStates();
 
 public:
-    SDL_Window* m_sdlWnd;
 #if defined(WINDOWS)
     LRESULT MsgProc(HWND, UINT, WPARAM, LPARAM);
 #endif