Here https://github.com/otalk/jingle.js/blob/master/index.js#L45 stun:stun.l.google.com:19302 is the default.
And Here https://github.com/legastero/stanza.io/blob/master/lib/plugins/jingle.js#L9 using jingle without passing any conf; And so its by default getting the above specified ice server and I have only the option to add more ice server.
So how not to use stun:stun.l.google.com:19302 as ice server? Or to clear the default the ice servers?