DOS/Windows-specific code: sh-tdep.c and sh3-rom.c

[Eli Zaretskii <eliz@is.elta.co.il>]

    * sh-tdep.c:

    #if 0
    #ifdef _WIN32_WCE
    char **sh_register_names = sh3_reg_names;
    #else
    char **sh_register_names = sh_generic_reg_names;
    #endif
    #endif

It seems we could simply remove this, since it's disabled anyway.


    * sh3-rom.c:_initialize_sh3_rom()

    #ifdef _WINDOWS
      /* On windows we can talk through the parallel port too. */
	"Debug on a Hitachi eval board running the SH-3 rom monitor.\n"
	"Specify the serial device it is connected to (e.g. com2).\n"
	"If you want to use the parallel port to download to it, specify that\n"
	"as the second argument. (e.g. lpt1)";
    #else
	"Debug on a Hitachi eval board running the SH-3 rom monitor.\n\
    Specify the serial device it is connected to (e.g. /dev/ttya).";
    #endif

It should be good enough to have a single string here which would tell
that parallel port is only available on Windows.