Remove unused Actions property

This property was defined but never utilized, causing unnecessary clutter. Its removal simplifies the SingleResponse class, enhancing maintainability and readability.

+semver: breaking

src/ApiResponse/SingleResponse.cs

@@ -14,6 +14,6 @@ public SingleResponse(TModel model,  List<KeyValuePair<string, string[]>> valida
             Item = model;
         }
         public TModel Item { get; }
-        public List<Actions> Actions { get; set; }
+
     }
 }