plugin ip: don't set to anymore for IQ stanza, as we send it to our server

sat/plugins/plugin_misc_ip.py

@@ -274,7 +274,6 @@ class IPPlugin(object):
         if ip_check:
             log.debug("Server IP Check available, we use it to retrieve our IP")
             iq_elt = client.IQ("get")
-            iq_elt['to'] = client.host
             iq_elt.addElement((NS_IP_CHECK, "address"))
             try:
                 result_elt = yield iq_elt.send()