remove old sys_vgui call that's now replaced by gui_vmess

pd/src/s_main.c

@@ -171,7 +171,6 @@ static void openit(const char *dirname, const char *filename)
     {
         close (fd);
         glob_evalfile(0, gensym(nameptr), gensym(dirbuf));
-        //sys_vgui("pdtk_set_current_dir {%s}\n", filename);
         gui_vmess("gui_set_current_dir", "xs",
             0, filename);
     }