Incorporate Stephane's feedback: if we already know we're getting list of int or udi, we don't need to cast, or even test for the PropertyEditorAlias

src/Umbraco.Web/Models/RelatedLinkBase.cs

@@ -15,7 +15,6 @@ namespace Umbraco.Web.Models
         public bool IsInternal { get; set; }
         [JsonProperty("type")]
         public RelatedLinkType Type { get; set; }
-        [JsonProperty("content")]
         public IPublishedContent Content { get; set; }
     }
 }