[PATCH] lib: remove unused `STROF` definition (NFC)

[Mark Wielaard]

Hi Saleem,

On Fri, 2021-08-27 at 15:20 +0000, Saleem Abdulrasool via Elfutils-devel wrote:
> This definition was in the fallback path, where `sys/cdefs.h` is not
> available.  Now that we have a single path through here, this macro gets
> defined, though is unused.  Remove the unused macro definition.

The STROF macro is not used, so this is indeed a NFC.
Pushed.

Thanks,

Mark