Remove unused "parent" parameter warning for DevicesModel::rowCount()

src/devicesmodel.cpp

@@ -41,6 +41,7 @@ QVariant DevicesModel::data(const QModelIndex &index, int role) const
 
 int DevicesModel::rowCount(const QModelIndex &parent) const
 {
+    Q_UNUSED(parent);
     return m_devices.size();
 }