SDL_mouse.c doesn't need default_cursor.h.

src/events/SDL_mouse.c

@@ -27,7 +27,6 @@
 #include "SDL_timer.h"
 #include "SDL_events.h"
 #include "SDL_events_c.h"
-#include "default_cursor.h"
 #include "../video/SDL_sysvideo.h"
 
 /* #define DEBUG_MOUSE */