Fix a compiler warning about unused lambda capture

src/filepropertiesplugin/baloofilepropertiesplugin.cpp

@@ -57,7 +57,7 @@ BalooFilePropertiesPlugin::BalooFilePropertiesPlugin(QObject *parent, const QLis
     metaDataArea->setWidgetResizable(true);
     metaDataArea->setFrameShape(QFrame::NoFrame);
 
-    connect(metaDataWidget, &Baloo::FileMetaDataWidget::metaDataRequestFinished, this, [this, metaDataArea, metaDataWidget] {
+    connect(metaDataWidget, &Baloo::FileMetaDataWidget::metaDataRequestFinished, this, [this, metaDataArea] {
         properties->addPage(metaDataArea, i18nc("Tab page with file meta data", "&Details"));
     });
 }