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/stdlib/SDL_qsort.c

@@ -560,6 +560,3 @@ SDL_bsearch(const void *key, const void *base, size_t nmemb, size_t size, int (*
     return NULL;
 #endif /* HAVE_BSEARCH */
 }
-
-/* vi: set ts=4 sw=4 expandtab: */
-