Remove unnecessary code

src/panelplugins/documentationpanel/documentationpanelplugin.cpp

@@ -35,6 +35,9 @@ DocumentationPanelPlugin::~DocumentationPanelPlugin()
 
 void DocumentationPanelPlugin::onSessionChanged()
 {
+    m_backendName = session()->backend()->name();
+    m_backendIcon = session()->backend()->icon();
+
     if(m_widget)
     {
         m_widget->setBackend(m_backendName);
@@ -44,9 +47,6 @@ void DocumentationPanelPlugin::onSessionChanged()
 
 QWidget* DocumentationPanelPlugin::widget()
 {
-    m_backendName = session()->backend()->name();
-    m_backendIcon = session()->backend()->icon();
-
     if(!m_widget)
     {
         m_widget = new DocumentationPanelWidget(m_backendName, m_backendIcon, parentWidget());

src/panelplugins/documentationpanel/documentationpanelwidget.cpp

@@ -380,8 +380,7 @@ void DocumentationPanelWidget::downloadResource(QWebEngineDownloadItem* resource
 
 void DocumentationPanelWidget::loadDocumentation()
 {
-    const QString& backend = backendName();
-    const QString& fileName = QStandardPaths::locate(QStandardPaths::AppDataLocation, QLatin1String("documentation/") + backend + QLatin1String("/help.qch"));
+    const QString& fileName = QStandardPaths::locate(QStandardPaths::AppDataLocation, QLatin1String("documentation/") + m_backend + QLatin1String("/help.qch"));
     const QString& nameSpace = QHelpEngineCore::namespaceName(fileName);
 
     if(nameSpace.isEmpty() || !m_engine->registeredDocumentations().contains(nameSpace))
@@ -390,8 +389,3 @@ void DocumentationPanelWidget::loadDocumentation()
             qWarning() << m_engine->error();
     }
 }
-
-QString DocumentationPanelWidget::backendName() const
-{
-    return m_backend;
-}

src/panelplugins/documentationpanel/documentationpanelwidget.h

@@ -45,12 +45,8 @@ class DocumentationPanelWidget : public QWidget
     ~DocumentationPanelWidget();
 
     void setBackend(const QString&);
-
     void setBackendIcon(const QString&);
 
-    /** @return name of the current backend **/
-    QString backendName() const;
-
     void loadDocumentation();
 
   Q_SIGNALS: