Disable warnings that would be refactored anyway (#5047)

Content.Shared/Alert/SharedAlertsComponent.cs

@@ -181,7 +181,9 @@ namespace Content.Shared.Alert
     /// A message that calls the click interaction on a alert
     /// </summary>
     [Serializable, NetSerializable]
+#pragma warning disable 618
     public class ClickAlertMessage : ComponentMessage
+#pragma warning restore 618
     {
         public readonly AlertType Type;