Remove redundant check

Signed-off-by: gnattu <gnattuoc@me.com>

MediaBrowser.Providers/MediaInfo/AudioFileProber.cs

@@ -359,10 +359,6 @@ namespace MediaBrowser.Providers.MediaInfo
                 if ((track.AdditionalFields.TryGetValue("MUSICBRAINZ_RELEASETRACKID", out var trackMbId)
                      || track.AdditionalFields.TryGetValue("MusicBrainz Release Track Id", out trackMbId))
                     && !string.IsNullOrEmpty(trackMbId))
-                {
-                    audio.SetProviderId(MetadataProvider.MusicBrainzTrack, trackMbId);
-                }
-                if (trackMbId is not null)
                 {
                     audio.TrySetProviderId(MetadataProvider.MusicBrainzTrack, trackMbId);
                 }