Update to 3.5.2 and .net core 2.1

MediaBrowser.Controller/MediaEncoding/ISubtitleEncoder.cs

@@ -1,32 +0,0 @@
-using MediaBrowser.Model.MediaInfo;
-using System.IO;
-using System.Threading;
-using System.Threading.Tasks;
-
-namespace MediaBrowser.Controller.MediaEncoding
-{
-    public interface ISubtitleEncoder
-    {
-        /// <summary>
-        /// Gets the subtitles.
-        /// </summary>
-        /// <returns>Task{Stream}.</returns>
-        Task<Stream> GetSubtitles(string itemId,
-            string mediaSourceId,
-            int subtitleStreamIndex,
-            string outputFormat,
-            long startTimeTicks,
-            long? endTimeTicks,
-            bool preserveOriginalTimestamps,
-            CancellationToken cancellationToken);
-
-        /// <summary>
-        /// Gets the subtitle language encoding parameter.
-        /// </summary>
-        /// <param name="path">The path.</param>
-        /// <param name="protocol">The protocol.</param>
-        /// <param name="cancellationToken">The cancellation token.</param>
-        /// <returns>System.String.</returns>
-        Task<string> GetSubtitleFileCharacterSet(string path, string language, MediaProtocol protocol, CancellationToken cancellationToken);
-    }
-}