remove not used model
agent publish json messages to the queue

{"metrics": [{"name": "random", "value": "32587.19074"}, {"name":
"bob", "value": "2"}], "result": 0, "agent": "unknown", "org":
"alfresco", "timestamp": "2013-09-02T12:40:39.639937+00:00",
"plugin_name": "nagios"}