common: Remove translate_sys2libc_fd_int.
* common/sysutils.c (translate_sys2libc_fd_int): Remove. (check_special_filename): Use translate_sys2libc_fdstr. * common/sysutils.h (translate_sys2libc_fd_int): Remove.
- GnuPG-bug-id: T6551
- Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>