moved more includes to sysconfig.h

textures.cpp

@@ -1,12 +1,6 @@
 // Hyperbolic Rogue -- texture mode
 // Copyright (C) 2011-2018 Zeno Rogue, see 'hyper.cpp' for details
 
-#if CAP_SDL_IMG
-#include <SDL/SDL_image.h>
-#elif CAP_PNG
-#include <png.h>
-#endif
-
 #if CAP_TEXTURE
 namespace hr { namespace texture {