Fix merge.

Author: ajcvickers

test/EFCore.Design.Tests/Scaffolding/Internal/CSharpRuntimeModelCodeGeneratorTest.cs

@@ -3664,18 +3664,6 @@ public class IdentityUser : TestModels.AspNetIdentity.IdentityUser
     }
 
 
-    public class SelfReferentialEntity
-    {
-        public long Id { get; set; }
-
-        public SelfReferentialProperty Collection { get; set; }
-    }
-
-    public class SelfReferentialProperty : List<SelfReferentialProperty>
-    {
-    }
-
-
     public class SelfReferentialEntity
     {
         public long Id { get; set; }