Revert "Fix eTags DateLastSaved"

MediaBrowser.Controller/Entities/BaseItem.cs

@@ -549,7 +549,8 @@ namespace MediaBrowser.Controller.Entities
         /// <value>The date modified.</value>
         [JsonIgnore]
         public DateTime DateModified { get; set; }
-    
+
+        [JsonIgnore]
         public DateTime DateLastSaved { get; set; }
 
         [JsonIgnore]