It's already defined in KAboutData

contactprintthemeeditor/main.cpp

@@ -30,7 +30,6 @@ int main(int argc, char **argv)
                          i18n("Copyright © 2015-%1 contactprintthemeeditor authors", QStringLiteral("2022")));
     aboutData.addAuthor(i18n("Laurent Montel"), i18n("Maintainer"), QStringLiteral("montel@kde.org"));
     QApplication::setWindowIcon(QIcon::fromTheme(QStringLiteral("kaddressbook")));
-    aboutData.setOrganizationDomain(QByteArray("kde.org"));
     aboutData.setProductName(QByteArray("contactprintthemeeditor"));
 
     KAboutData::setApplicationData(aboutData);

contactthemeeditor/main.cpp

@@ -40,7 +40,6 @@ int main(int argc, char **argv)
                          i18n("Copyright © 2013-%1 contactthemeeditor authors", QStringLiteral("2022")));
     aboutData.addAuthor(i18n("Laurent Montel"), i18n("Maintainer"), QStringLiteral("montel@kde.org"));
     QApplication::setWindowIcon(QIcon::fromTheme(QStringLiteral("kaddressbook")));
-    aboutData.setOrganizationDomain(QByteArray("kde.org"));
     aboutData.setProductName(QByteArray("contactthemeeditor"));
 
     KAboutData::setApplicationData(aboutData);

headerthemeeditor/main.cpp

@@ -41,7 +41,6 @@ int main(int argc, char **argv)
                          i18n("Copyright © 2013-%1 headerthemeeditor authors", QStringLiteral("2022")));
     aboutData.addAuthor(i18n("Laurent Montel"), i18n("Maintainer"), QStringLiteral("montel@kde.org"));
     QApplication::setWindowIcon(QIcon::fromTheme(QStringLiteral("kmail")));
-    aboutData.setOrganizationDomain(QByteArray("kde.org"));
     aboutData.setProductName(QByteArray("headerthemeeditor"));
 
     KAboutData::setApplicationData(aboutData);