don't case now that we use a single constructor

src/Nri/Ui/FocusTrap/V1.elm

@@ -32,11 +32,9 @@ type FocusTrap
 {-| Attach this attribute to add a focus trap to an HTML element.
 -}
 toAttribute : (String -> msg) -> FocusTrap -> Html.Attribute msg
-toAttribute focus trap =
+toAttribute focus (FocusTrap { firstId, lastId }) =
     onTab <|
         \elementId shiftKey ->
-            case trap of
-                FocusTrap { firstId, lastId } ->
             -- if the user tabs back while on the first id,
             -- we want to wrap around to the last id.
             if elementId == firstId && shiftKey then