Remove unused digdelv/ans6 server

This server receives no queries during the test and doesn't affect the
test outcome.

diff --git a/bin/tests/system/digdelv/ans6/ans.pl b/bin/tests/system/digdelv/ans6/ans.pl
deleted file mode 100755 (executable)
index 39d02b2..0000000
--- a/bin/tests/system/digdelv/ans6/ans.pl
+++ /dev/null
@@ -1,84 +0,0 @@
-#!/usr/bin/perl -w
-
-# Copyright (C) Internet Systems Consortium, Inc. ("ISC")
-#
-# SPDX-License-Identifier: MPL-2.0
-#
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0.  If a copy of the MPL was not distributed with this
-# file, you can obtain one at https://mozilla.org/MPL/2.0/.
-#
-# See the COPYRIGHT file distributed with this work for additional
-# information regarding copyright ownership.
-
-use IO::File;
-use IO::Socket;
-use Net::DNS;
-use Net::DNS::Packet;
-
-my $localport = int($ENV{'PORT'});
-if (!$localport) { $localport = 5300; }
-
-my $sock = IO::Socket::INET->new(LocalAddr => "10.53.0.6",
-   LocalPort => $localport, Proto => "udp") or die "$!";
-
-my $pidf = new IO::File "ans.pid", "w" or die "cannot open pid file: $!";
-print $pidf "$$\n" or die "cannot write pid file: $!";
-$pidf->close or die "cannot close pid file: $!";
-sub rmpid { unlink "ans.pid"; exit 1; };
-
-$SIG{INT} = \&rmpid;
-$SIG{TERM} = \&rmpid;
-
-for (;;) {
-       $sock->recv($buf, 512);
-
-       print "**** request from " , $sock->peerhost, " port ", $sock->peerport, "\n";
-
-       my $packet;
-
-       if ($Net::DNS::VERSION > 0.68) {
-               $packet = new Net::DNS::Packet(\$buf, 0);
-               $@ and die $@;
-       } else {
-               my $err;
-               ($packet, $err) = new Net::DNS::Packet(\$buf, 0);
-               $err and die $err;
-       }
-
-       print "REQUEST:\n";
-       $packet->print;
-
-       $packet->header->qr(1);
-
-       my @questions = $packet->question;
-       my $qname = $questions[0]->qname;
-       my $qtype = $questions[0]->qtype;
-
-       my $donotrespond = 0;
-
-       $packet->header->aa(1);
-       if ($qtype eq "A") {
-               $packet->push("answer",
-                             new Net::DNS::RR($qname .  " 300 A 10.53.0.5"));
-       } else {
-               $donotrespond = 1;
-       }
-
-       if ($donotrespond == 0) {
-                my $sendsock =
-                        IO::Socket::INET->new(LocalAddr => "10.53.1.2",
-                                              PeerAddr => $sock->peerhost,
-                                              PeerPort => $sock->peerport,
-                                              Proto => "udp") or die "$!";
-                print "**** response from ", $sendsock->sockhost, " to " ,
-                      $sendsock->peerhost, " port ", $sendsock->peerport, "\n";
-               $sendsock->send($packet->data);
-                $sendsock->close;
-               print "RESPONSE:\n";
-               $packet->print;
-               print "\n";
-       } else {
-               print "DROP:\n";
-       }
-}