translations: inherit constructors from base class

since we only have trivial ctors it's more modern to simply inherit the
base class' ctors.

kcms/translations/translationsmodel.cpp

@@ -227,11 +227,6 @@ QString TranslationsModel::languageCodeToName(const QString &languageCode) const
     return languageName;
 }
 
-SelectedTranslationsModel::SelectedTranslationsModel(QObject *parent)
-    : TranslationsModel(parent)
-{
-}
-
 QVariant SelectedTranslationsModel::data(const QModelIndex &index, int role) const
 {
     if (!index.isValid() || index.row() < 0 || index.row() >= m_selectedLanguages.count()) {
@@ -408,11 +403,6 @@ void SelectedTranslationsModel::remove(const QString &languageCode)
     emit selectedLanguagesChanged(m_selectedLanguages);
 }
 
-AvailableTranslationsModel::AvailableTranslationsModel(QObject *parent)
-    : TranslationsModel(parent)
-{
-}
-
 QVariant AvailableTranslationsModel::data(const QModelIndex &index, int role) const
 {
     if (!index.isValid() || index.row() < 0 || index.row() >= m_availableLanguages.count()) {

kcms/translations/translationsmodel.h

@@ -64,7 +64,7 @@ class SelectedTranslationsModel : public TranslationsModel
     Q_PROPERTY(QStringList missingLanguages READ missingLanguages NOTIFY missingLanguagesChanged)
 
 public:
-    explicit SelectedTranslationsModel(QObject *parent = nullptr);
+    using TranslationsModel::TranslationsModel;
 
     QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
     int rowCount(const QModelIndex &parent = QModelIndex()) const override;
@@ -97,7 +97,7 @@ class AvailableTranslationsModel : public TranslationsModel
     Q_OBJECT
 
 public:
-    explicit AvailableTranslationsModel(QObject *parent = nullptr);
+    using TranslationsModel::TranslationsModel;
 
     QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
     int rowCount(const QModelIndex &parent = QModelIndex()) const override;