Remove sparc64 ifdef

Now we default to setting the hardware clock to UTC
everywhere. sparc64 was the old odd-man out before.

Reivewed by: cy@, bcr@
Differential Revision: https://reviews.freebsd.org/D23593

usr.sbin/tzsetup/tzsetup.c

@@ -1020,9 +1020,7 @@ main(int argc, char **argv)
 		    "If it is set to local time,\n"
 		    "or you don't know, please choose NO here!");
 		dlg_save_vars(&save_vars);
-#if !defined(__sparc64__)
 		dialog_vars.defaultno = TRUE;
-#endif
 		yesno = dialog_yesno(title, prompt, 7, 73);
 		dlg_restore_vars(&save_vars);
 		if (!yesno) {