remove SDL2 from include

model.c

@@ -1,10 +1,10 @@
 // SDL2 Demo by aurelien.esnard@u-bordeaux.fr
 
 #include "model.h"
-#include <SDL2/SDL.h>
-#include <SDL2/SDL_image.h>  // required to load transparent texture from PNG
-#include <SDL2/SDL_ttf.h>    // required to use TTF fonts
+#include <SDL.h>
+#include <SDL_image.h>  // required to load transparent texture from PNG
 #include <SDL_mixer.h>
+#include <SDL_ttf.h>  // required to use TTF fonts
 #include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>