HAVE_OPENGL is defined by CMake on macOS

test/testgl2.c

@@ -16,10 +16,6 @@
 
 #include "SDL_test_common.h"
 
-#ifdef __MACOS__
-#define HAVE_OPENGL
-#endif
-
 #ifdef HAVE_OPENGL
 
 #include "SDL_opengl.h"