ExamplesListModel: Remove unneeded override of data(...)

It seems to have been a workaround for taking tags into account for the
filtering, but that is done completely different nowadays, and not with
the DisplayRole.

Change-Id: Iff73c1a33de4a40c4919794a8644fdc4af710ba1
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/qtsupport/exampleslistmodel.cpp

@@ -637,29 +637,6 @@ QStringList ExampleSetModel::exampleSources(QString *examplesInstallPath, QStrin
     return sources;
 }
 
-QString prefixForItem(const ExampleItem *item)
-{
-    QTC_ASSERT(item, return {});
-    if (item->isHighlighted)
-        return QLatin1String("0000 ");
-    return QString();
-}
-
-QVariant ExamplesListModel::data(const QModelIndex &index, int role) const
-{
-    if (!index.isValid() || index.row() >= m_items.count())
-        return QVariant();
-
-    ExampleItem *item = static_cast<ExampleItem *>(m_items.at(index.row()));
-    switch (role)
-    {
-    case Qt::DisplayRole: // for search only
-        return QString(prefixForItem(item) + item->name + ' ' + item->tags.join(' '));
-    default:
-        return ListModel::data(index, role);
-    }
-}
-
 void ExampleSetModel::selectExampleSet(int index)
 {
     if (index != m_selectedExampleSetIndex) {

src/plugins/qtsupport/exampleslistmodel.h

@@ -106,8 +106,6 @@ class ExamplesListModel : public Core::ListModel
 public:
     explicit ExamplesListModel(QObject *parent);
 
-    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const final;
-
     void updateExamples();
 
     QStringList exampleSets() const;