dirty tracking, entities, cloning moved

src/Umbraco.Core/Models/DoNotCloneAttribute.cs

@@ -1,23 +0,0 @@
-using System;
-
-namespace Umbraco.Core.Models
-{
-    /// <summary>
-    /// Used to attribute properties that have a setter and are a reference type
-    /// that should be ignored for cloning when using the DeepCloneHelper
-    /// </summary>
-    /// <remarks>
-    ///
-    /// This attribute must be used:
-    /// * when the property is backed by a field but the result of the property is the un-natural data stored in the field
-    ///
-    /// This attribute should not be used:
-    /// * when the property is virtual
-    /// * when the setter performs additional required logic other than just setting the underlying field
-    ///
-    /// </remarks>
-    public class DoNotCloneAttribute : Attribute
-    {
-
-    }
-}