it depends against qt5.15

src/bugzillaintegration/bugzillalib.cpp

@@ -128,11 +128,7 @@ void BugzillaManager::setFeaturesForVersion(const QString& version)
     // the change should actually be implemented.
 
     const int nVersionParts = 3;
-#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
-    QStringList digits = version.split(QRegularExpression(QStringLiteral("[._-]")), QString::SkipEmptyParts);
-#else
     QStringList digits = version.split(QRegularExpression(QStringLiteral("[._-]")), Qt::SkipEmptyParts);
-#endif
     while (digits.count() < nVersionParts) {
         digits << QLatin1String("0");
     }

src/bugzillaintegration/productmapping.cpp

@@ -51,11 +51,7 @@ void ProductMapping::mapUsingInternalFile(const QString & appName)
     if (mappings.hasKey(appName)) {
         QString mappingString = mappings.readEntry(appName);
         if (!mappingString.isEmpty()) {
-#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
-            QStringList list = mappingString.split(QLatin1Char('|'), QString::SkipEmptyParts);
-#else
             QStringList list = mappingString.split(QLatin1Char('|'), Qt::SkipEmptyParts);
-#endif
             if (list.count()==2) {
                 m_bugzillaProduct = list.at(0);
                 m_bugzillaComponent = list.at(1);
@@ -87,11 +83,7 @@ void ProductMapping::getRelatedProductsUsingInternalFile(const QString & bugzill
                             "(or there was an error when reading)";
             return;
         }
-#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
-        groups = group.split(QLatin1Char('|'), QString::SkipEmptyParts);
-#else
         groups = group.split(QLatin1Char('|'), Qt::SkipEmptyParts);
-#endif
     }
 
     //All KDE apps use the KDE Platform (basic libs)
@@ -106,11 +98,7 @@ void ProductMapping::getRelatedProductsUsingInternalFile(const QString & bugzill
         if (bzGroups.hasKey(group)) {
             QString bzGroup = bzGroups.readEntry(group);
             if (!bzGroup.isEmpty()) {
-#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
-                QStringList relatedGroups = bzGroup.split(QLatin1Char('|'), QString::SkipEmptyParts);
-#else
                 QStringList relatedGroups = bzGroup.split(QLatin1Char('|'), Qt::SkipEmptyParts);
-#endif
                 if (relatedGroups.size()>0) {
                     m_relatedBugzillaProducts.append(relatedGroups);
                 }

src/debugger.cpp

@@ -65,11 +65,7 @@ QString Debugger::tryExec() const
 QStringList Debugger::supportedBackends() const
 {
     return isValid() ? m_config->group("General").readEntry("Backends")
-#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
-                                   .split(QLatin1Char('|'), QString::SkipEmptyParts) : QStringList();
-#else
                                    .split(QLatin1Char('|'), Qt::SkipEmptyParts) : QStringList();
-#endif
 }
 
 void Debugger::setUsedBackend(const QString & backendName)