* c-exp.y (THIS): Delete token and grammar rule.

    * c-exp.y (THIS): Delete token and grammar rule.
        (yylex): Don't return THIS.
        * cp-valprint.c (vtbl_ptr_name_old): Delete.
        (cp_is_vtbl_ptr_type): Don't check vtbl_ptr_name_old.
        * demangle.c (cplus_markers): Update comment.  Put '$'
        first.  Remove CPLUS_MARKER.
        (_initialize_demangler): Don't call set_cplus_marker_for_demangling.
        * jv-exp.y (THIS): Delete token and grammar rule.
        (yylex): Don't return THIS.
        * mips-tdep.c (mips_dump_tdep): Don't dump CPLUS_MARKER.
        * objc-exp.y (THIS): Delete token and grammar rule.
        (yylex): Don't return THIS.
        * p-exp.y (yylex): Remove reference to CPLUS_MARKER.
        * stabsread.c (vptr_name, vb_name): Replace CPLUS_MARKER with '$'.
        (read_member_functions): Likewise for opname.
        (read_tilde_fields): Use is_cplus_marker.

        * defs.h (CPLUS_MARKER): Don't define.
        * config/tm-sysv4.h (CPLUS_MARKER): Likewise.
        * config/i386/xm-i386sco.h (CPLUS_MARKER): Likewise.
        * config/mips/tm-irix3.h (CPLUS_MARKER): Likewise.
        * config/mips/tm-irix6.h (CPLUS_MARKER): Likewise.
        * config/rs6000/tm-rs6000.h (CPLUS_MARKER): Likewise.

        * config/i386/tm-i386v4.h: Delete file.
        * config/djgpp/fnchange.lst: Delete tm-i386v4.h.
        * config/i386/tm-i386sol2.h: Include "i386/tm-i386.h" instead.
        * config/i386/tm-i386v42mp.h: Include "i386/tm-i386.h" instead.
        * config/i386/tm-ptx.h: Include "i386/tm-i386.h" instead.
        * config/i386/i386gnu.mt (TM_FILE): Use tm-i386.h.
        * config/i386/i386sco5.mt (TM_FILE): Likewise.
        * config/i386/i386v4.mt (TM_FILE): Likewise.
        * config/i386/ncr3000.mt (TM_FILE): Likewise.