Fixes issue - TRACK_REMOVED is not fired if only the local participant is alone in the conference

JitsiConference.js

@@ -333,8 +333,10 @@ JitsiConference.prototype._fireMuteChangeEvent = function (track) {
  */
 JitsiConference.prototype.removeTrack = function (track) {
     if(!this.room){
-        if(this.rtc)
+        if(this.rtc) {
             this.rtc.removeLocalStream(track);
+            this.eventEmitter.emit(JitsiConferenceEvents.TRACK_REMOVED, track);
+        }
         return;
     }
     this.room.removeStream(track.getOriginalStream(), function(){

modules/xmpp/ChatRoom.js

@@ -563,8 +563,10 @@ ChatRoom.prototype.setJingleSession = function(session){
 
 
 ChatRoom.prototype.removeStream = function (stream, callback) {
-    if(!this.session)
+    if(!this.session) {
+        callback();
         return;
+    }
     this.session.removeStream(stream, callback);
 };