Remove GNU Pth support.
* src/posix-sys-pth-impl.h: Remove. * src/w32-sys-pth-impl.h: Remove. * src/Makefile.am: Follow the change. * src/assuan.h.in (ASSUAN_SYSTEM_PTH_IMPL, ASSUAN_SYSTEM_PTH): Remove. * src/mkheader.c (write_special): Remove Pth support.
- GnuPG-bug-id: T5911
- Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>