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_crc32.c

@@ -48,5 +48,3 @@ Uint32 SDL_crc32(Uint32 crc, const void *data, size_t len)
     }
     return crc;
 }
-
-/* vi: set ts=4 sw=4 expandtab: */