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/misc/windows/SDL_sysurl.c

@@ -57,5 +57,3 @@ int SDL_SYS_OpenURL(const char *url)
     return (rc > ((HINSTANCE)32)) ? 0 : WIN_SetError("Couldn't open given URL.");
 }
 #endif
-
-/* vi: set ts=4 sw=4 expandtab: */