Update to 3.5.2 and .net core 2.1

MediaBrowser.Common/Configuration/IConfigurationFactory.cs

@@ -1,22 +0,0 @@
-using System;
-using System.Collections.Generic;
-
-namespace MediaBrowser.Common.Configuration
-{
-    public interface IConfigurationFactory
-    {
-        IEnumerable<ConfigurationStore> GetConfigurations();
-    }
-
-    public class ConfigurationStore
-    {
-        public string Key { get; set; }
-
-        public Type ConfigurationType { get; set; }
-    }
-
-    public interface IValidatingConfiguration
-    {
-        void Validate(object oldConfig, object newConfig);
-    }
-}