Remove Graphics module and fix compilation

include/Nazara/Graphics/DebugOff.hpp

@@ -1,9 +0,0 @@
-// Copyright (C) 2020 Jérôme Leclercq
-// This file is part of the "Nazara Engine - Graphics module"
-// For conditions of distribution and use, see copyright notice in Config.hpp
-
-// We suppose that Debug.hpp is already included, same goes for Config.hpp
-#if NAZARA_GRAPHICS_MANAGE_MEMORY
-	#undef delete
-	#undef new
-#endif