Remove torrent tracker from archweb

Arch no longer runs it's own torrent tracker as DHT and webseeds work
well enough for us.

releng/models.py

@@ -4,7 +4,6 @@
 import hashlib
 from pytz import utc
 
-from django.conf import settings
 from django.urls import reverse
 from django.db import models
 from django.db.models.signals import pre_save
@@ -48,8 +47,6 @@ def magnet_uri(self):
         query = [
             ('dn', "archlinux-%s-x86_64.iso" % self.version),
         ]
-        if settings.TORRENT_TRACKERS:
-            query.extend(('tr', uri) for uri in settings.TORRENT_TRACKERS)
         metadata = self.torrent()
         if metadata and 'info_hash' in metadata:
             query.insert(0, ('xt', "urn:btih:%s" % metadata['info_hash']))

settings.py

@@ -164,12 +164,6 @@
 # community bit on the end, repo.svn_root is appended)
 SVN_BASE_URL = 'svn://svn.archlinux.org/'
 
-# Trackers used for ISO download magnet links
-TORRENT_TRACKERS = (
-    'udp://tracker.archlinux.org:6969',
-    'http://tracker.archlinux.org:6969/announce',
-)
-
 # How long to keep mirrorlog's in days
 MIRRORLOG_RETENTION_PERIOD = 365