Remove Google STUN server

Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>

js/simplewebrtc/webrtc.js

@@ -12,7 +12,7 @@ function WebRTC(opts) {
 			debug: false,
 			// makes the entire PC config overridable
 			peerConnectionConfig: {
-				iceServers: [{'urls': 'stun:stun.l.google.com:19302'}]
+				iceServers: []
 			},
 			peerConnectionConstraints: {
 				optional: []