remove no longer used audio button (#759)

-(function(videojs) {
-  var Component = videojs.getComponent('Component');
-
-  // -----------------
-  // AudioTrackMenuItem
-  // -----------------
-  //
-  var MenuItem = videojs.getComponent('MenuItem');
-
-  var AudioTrackMenuItem = videojs.extend(MenuItem, {
-    constructor: function(player, options) {
-      var track = options.track;
-      var tracks = player.audioTracks();
-
-      options.label = track.label || track.language || 'Unknown';
-      options.selected = track.enabled;
-
-      MenuItem.call(this, player, options);
-
-      this.track = track;
-
-      if (tracks) {
-        var changeHandler = videojs.bind(this, this.handleTracksChange);
-
-        tracks.addEventListener('change', changeHandler);
-        this.on('dispose', function() {
-          tracks.removeEventListener('change', changeHandler);
-        });
-      }
-    },
-
-    handleClick: function(event) {
-      var kind = this.track.kind;
-      var tracks = this.player_.audioTracks();
-
-      MenuItem.prototype.handleClick.call(this, event);
-
-      if (!tracks) return;
-
-      for (var i = 0; i < tracks.length; i++) {
-        var track = tracks[i];
-
-        if (track === this.track) {
-          track.enabled = true;
-        }
-      }
-    },
-
-    handleTracksChange: function(event) {
-      this.selected(this.track.enabled);
-    }
-  });
-
-  Component.registerComponent('AudioTrackMenuItem', AudioTrackMenuItem);
-
-  // -----------------
-  // AudioTrackButton
-  // -----------------
-  //
-  var MenuButton = videojs.getComponent('MenuButton');
-
-  var AudioTrackButton = videojs.extend(MenuButton, {
-    constructor: function(player, options) {
-      MenuButton.call(this, player, options);
-      this.el_.setAttribute('aria-label','Audio Menu');
-
-      var tracks = this.player_.audioTracks();
-
-      if (this.items.length <= 1) {
-        this.hide();
-      }
-
-      if (!tracks) {
-        return;
-      }
-
-      var updateHandler = videojs.bind(this, this.update);
-      tracks.addEventListener('removetrack', updateHandler);
-      tracks.addEventListener('addtrack', updateHandler);
-
-      this.player_.on('dispose', function() {
-        tracks.removeEventListener('removetrack', updateHandler);
-        tracks.removeEventListener('addtrack', updateHandler);
-      });
-    },
-
-    buildCSSClass() {
-      return 'vjs-subtitles-button ' + MenuButton.prototype.buildCSSClass.call(this);
-    },
-
-    createItems: function(items) {
-      items = items || [];
-
-      var tracks = this.player_.audioTracks();
-
-      if (!tracks) {
-        return items;
-      }
-
-      for (var i = 0; i < tracks.length; i++) {
-        var track = tracks[i];
-
-        items.push(new AudioTrackMenuItem(this.player_, {
-          'selectable': true,
-          'track': track
-        }));
-      }
-
-      return items;
-    }
-  });
-
-  Component.registerComponent('AudioTrackButton', AudioTrackButton);
-})(window.videojs);

@@ -12,9 +12,6 @@
   <!-- HLS plugin -->
   <script src="../../dist/videojs-contrib-hls.js"></script>
 
-  <!-- Track Selector plugin -->
-  <script src="audio-track-selector.js"></script>
-
   <!-- player stats visualization -->
   <link href="stats.css" rel="stylesheet">
   <script src="../switcher/js/vendor/d3.min.js"></script>