fix clazy warning: removed dead QStrings

lib/akabeihelpers.cpp

@@ -975,7 +975,6 @@ int QueryPerformer::insertFiles(Database *db, Package* p)
 
 int QueryPerformer::insertFiles(AbstractSQLiteConnection &dbConnection, Package* p)
 {
-    const QString null = "NULL";
     QString sqlQuery = "INSERT INTO files ('package', 'file', 'backup', 'ultimateowner') VALUES (:Package, :File, :Backup, :UltimateOwner);";
 
     try {

tools/akabei-create-db/createdb.cpp

@@ -90,8 +90,6 @@ QStringList CreateDb::cleanTargets(const QStringList& targets)
 
 void CreateDb::start()
 {
-    QString dbFileName = m_db.split('/').last();
-
     m_targets = cleanTargets(m_targets);
 
     out << ":: Creating new database into " << m_db << "... ";