[Patch, libgfortran] Remove move_pos_offset

[Daniel Kraft]

Janne Blomqvist wrote:
> Hi,
> 
> move_pos_offset is nowadays not needed anymore. Back with the old low
> level I/O library, the sseek function didn't have a whence argument, but
> now the same functionality is provided by sseek(..., SEEK_CUR). The
> attached patch removes said function, and updates callers.
> 
> Regtested on i686-pc-linux-gnu, though with lots of ICE's due to some
> other patch, but no I/O regressions it seems.
> 
> Ok for trunk?

Ok.

Daniel

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