Remove some unused client capabilities and sync code (#10812)

MediaBrowser.Model/Dto/BaseItemDto.cs

@@ -85,11 +85,6 @@ namespace MediaBrowser.Model.Dto
 
         public string PreferredMetadataCountryCode { get; set; }
 
-        /// <summary>
-        /// Gets or sets a value indicating whether [supports synchronize].
-        /// </summary>
-        public bool? SupportsSync { get; set; }
-
         public string Container { get; set; }
 
         /// <summary>

MediaBrowser.Model/Querying/ItemFields.cs

@@ -175,13 +175,6 @@ namespace MediaBrowser.Model.Querying
         /// </summary>
         Studios,
 
-        BasicSyncInfo,
-
-        /// <summary>
-        /// The synchronize information.
-        /// </summary>
-        SyncInfo,
-
         /// <summary>
         /// The taglines of the item.
         /// </summary>

MediaBrowser.Model/Session/ClientCapabilities.cs

@@ -23,14 +23,8 @@ namespace MediaBrowser.Model.Session
 
         public bool SupportsMediaControl { get; set; }
 
-        public bool SupportsContentUploading { get; set; }
-
-        public string MessageCallbackUrl { get; set; }
-
         public bool SupportsPersistentIdentifier { get; set; }
 
-        public bool SupportsSync { get; set; }
-
         public DeviceProfile DeviceProfile { get; set; }
 
         public string AppStoreUrl { get; set; }