* configure.in (AC_DECL_SYS_SIGLIST, xm-siglist.h,
        arm/xm-netbsd.h, NO_SYS_SIGLIST): Don't use.

        * xm-siglist.h, arm/xm-netbsd.h, mips/xm-news.h, mips/xm-sysv4.h:
        Delete files.

        * gcc.texi (NO_SYS_SIGLIST, sys_siglist, SYS_SIGLIST_DECLARED):
        Delete descriptions.

        * i386/osf1elf.h, i386/xm-cygwin.h, i386/xm-mingw32.h, m68k/3b1.h,
        m68k/a-ux.h, m68k/dpx2.h, m68k/plexus.h, m68k/xm-hp320.h,
        m88k/xm-m88k.h, mips/x-sni-svr4, pa/xm-pa.h, pa/xm-pahpux.h,
        pa/xm-papro.h, we32k/xm-we32k.h, winnt/xm-winnt.h, xm-interix.h,
        xm-svr4.h: Remove all instances of sys_siglist handling.

From-SVN: r31109