Remove host config for xmpp bots

site-cookbooks/kosmos-hubot/recipes/hal8000_xmpp.rb

@@ -74,7 +74,6 @@ service_env = {
   "NODE_OPTIONS"                   => "--use-openssl-ca",
   "HUBOT_XMPP_USERNAME"            => "hal8000@kosmos.org/hubot",
   "HUBOT_XMPP_PASSWORD"            => data_bag['xmpp_password'],
-  "HUBOT_XMPP_HOST"                => "xmpp.kosmos.org",
   "HUBOT_XMPP_ROOMS"               => node[app_name]['rooms'].join(','),
   "HUBOT_AUTH_ADMIN"               => node[app_name]['auth_admins'].join(','),
   "HUBOT_RSS_PRINTSUMMARY"         => "false",