Update to 3.5.2 and .net core 2.1

MediaBrowser.Controller/Library/IMetadataFileSaver.cs

@@ -1,19 +0,0 @@
-using MediaBrowser.Controller.Entities;
-
-namespace MediaBrowser.Controller.Library
-{
-    public interface IMetadataFileSaver : IMetadataSaver
-    {
-        /// <summary>
-        /// Gets the save path.
-        /// </summary>
-        /// <param name="item">The item.</param>
-        /// <returns>System.String.</returns>
-        string GetSavePath(IHasMetadata item);
-    }
-
-    public interface IConfigurableProvider
-    {
-        bool IsEnabled { get; }
-    }
-}