-#ifdef NEED_BSDTTY
-#include <sys/bsdtty.h>
-#endif
-
-#if defined (HPUX) && defined (HAVE_PTYS)
-#include <sys/ptyio.h>
-#endif
-
-#ifdef AIX
-#include <sys/pty.h>
-#include <unistd.h>
-#endif /* AIX */
-
-#ifdef SYSV_PTYS
-#include <sys/tty.h>
-#include <sys/pty.h>
-#endif
-
-/* saka@pfu.fujitsu.co.JP writes:
- FASYNC defined in this file. But, FASYNC don't working.
- so no problem, because unrequest_sigio only need. */
-#if defined (pfa)
-#include <sys/file.h>
-#endif
-