[plasmalnf] Remove unused path-setting from the widget

- Only Config needs to know the path, since it is responsible for
  doing the actual lnf changes.

src/modules/plasmalnf/PlasmaLnfPage.cpp

@@ -72,12 +72,6 @@ PlasmaLnfPage::PlasmaLnfPage( QWidget* parent )
     } )
 }
 
-void
-PlasmaLnfPage::setLnfPath( const QString& path )
-{
-    m_lnfPath = path;
-}
-
 void
 PlasmaLnfPage::setEnabledThemes( const ThemeInfoList& themes, bool showAll )
 {

src/modules/plasmalnf/PlasmaLnfPage.h

@@ -36,7 +36,6 @@ class PlasmaLnfPage : public QWidget
 public:
     explicit PlasmaLnfPage( QWidget* parent = nullptr );
 
-    void setLnfPath( const QString& path );
     /** @brief enable only the listed themes.
      *
      * Shows the listed @p themes with full information (e.g. screenshot).
@@ -61,7 +60,6 @@ private:
     void fillUi();
 
     Ui::PlasmaLnfPage* ui;
-    QString m_lnfPath;
     QString m_preselect;
     bool m_showAll;  // If true, don't winnow according to enabledThemes
     ThemeInfoList m_enabledThemes;

src/modules/plasmalnf/PlasmaLnfViewStep.cpp

@@ -98,7 +98,6 @@ PlasmaLnfViewStep::setConfigurationMap( const QVariantMap& configurationMap )
 {
     m_config->setConfigurationMap( configurationMap );
 
-    m_widget->setLnfPath( m_config->lnfToolPath() );
     m_widget->setPreselect( m_config->preselectedTheme() );
 
     bool showAll = CalamaresUtils::getBool( configurationMap, "showAll", false );