thumbnail: remove dead code

Audio streams are automatically played by WebRTC and this won't change, probably
ever. There is no point in having checks and an Audio component which does
nothing.

react/features/filmstrip/components/native/Thumbnail.js

 
 import { ColorSchemeRegistry } from '../../../base/color-scheme';
 import { openDialog } from '../../../base/dialog';
-import { MEDIA_TYPE, VIDEO_TYPE, Audio } from '../../../base/media';
+import { MEDIA_TYPE, VIDEO_TYPE } from '../../../base/media';
 import {
     PARTICIPANT_ROLE,
     ParticipantView,
 type Props = {
 
     /**
-     * The Redux representation of the participant's audio track.
+     * Whether local audio (microphone) is muted or not.
      */
-    _audioTrack: Object,
+    _audioMuted: boolean,
 
     /**
      * The Redux representation of the state "features/large-video".
      */
     render() {
         const {
-            _audioTrack: audioTrack,
+            _audioMuted: audioMuted,
             _largeVideo: largeVideo,
             _onClick,
             _onShowRemoteVideoMenu,
             tileView
         } = this.props;
 
-        // We don't render audio in any of the following:
-        // 1. The audio (source) is muted. There's no practical reason (that we
-        //    know of, anyway) why we'd want to render it given that it's
-        //    silence (& not even comfort noise).
-        // 2. The audio is local. If we were to render local audio, the local
-        //    participants would be hearing themselves.
-        const audioMuted = !audioTrack || audioTrack.muted;
-        const renderAudio = !audioMuted && !audioTrack.local;
         const participantId = participant.id;
         const participantInLargeVideo
             = participantId === largeVideo.participantId;
                 ] }
                 touchFeedback = { false }>
 
-                { renderAudio
-                    && <Audio
-                        stream
-                            = { audioTrack.jitsiTrack.getOriginalStream() } /> }
-
                 <ParticipantView
                     avatarSize = { AVATAR_SIZE }
                     disableVideo = { isScreenShare }
     const renderModeratorIndicator = !_isEveryoneModerator && participant.role === PARTICIPANT_ROLE.MODERATOR;
 
     return {
-        _audioTrack: audioTrack,
+        _audioMuted: audioTrack?.muted ?? true,
         _largeVideo: largeVideo,
         _renderDominantSpeakerIndicator: renderDominantSpeakerIndicator,
         _renderModeratorIndicator: renderModeratorIndicator,