[kcms/translations] Make last item removable

Apparently this does make sense given the current UX of the KCM.

kcms/translations/package/contents/ui/main.qml

@@ -233,7 +233,6 @@ ScrollViewKCM {
                 Kirigami.Action {
                     property bool removing: false
                     enabled: removing || !model.IsMissing
-                    visible: languagesList.count > 1
                     iconName: "list-remove"
                     tooltip: i18nc("@info:tooltip", "Remove")
                     onTriggered: {