Removed width/height parameters from LoadTexture()

You can directly access the texture width and height now.

test/testutils.h

@@ -16,8 +16,7 @@
 
 #include <SDL3/SDL.h>
 
-SDL_Texture *LoadTexture(SDL_Renderer *renderer, const char *file, bool transparent,
-                         int *width_out, int *height_out);
+SDL_Texture *LoadTexture(SDL_Renderer *renderer, const char *file, bool transparent);
 char *GetNearbyFilename(const char *file);
 char *GetResourceFilename(const char *user_specified, const char *def);