remove dead code - MQTT code from iibWidgets.js
remove dead code - MQTT code from iibWidgets.js

ot4i/iib-ops-widgets,ot4i/iib-ops-js,ot4i/iib-ops-widgets,hosie/integration-dashboard,ot4i/iib-ops-js,hosie/integration-dashboard,ot4i/iib-ops-rest