Removed the vi format comments from the source

Vim users can use the [editorconfig plugin](https://github.com/editorconfig/editorconfig-vim) to automatically set tab spacing for the SDL coding style.

Fixes https://github.com/libsdl-org/SDL/issues/6903

src/timer/SDL_timer.c

@@ -600,5 +600,3 @@ void SDL_Delay(Uint32 ms)
 {
     SDL_DelayNS(SDL_MS_TO_NS(ms));
 }
-
-/* vi: set ts=4 sw=4 expandtab: */