qt, refactor: Drop no longer used PeerTableModel::getNodeStats function

src/qt/peertablemodel.cpp

@@ -221,11 +221,6 @@ QModelIndex PeerTableModel::index(int row, int column, const QModelIndex &parent
     return QModelIndex();
 }
 
-const CNodeCombinedStats *PeerTableModel::getNodeStats(int idx)
-{
-    return priv->index(idx);
-}
-
 void PeerTableModel::refresh()
 {
     Q_EMIT layoutAboutToBeChanged();

src/qt/peertablemodel.h

@@ -53,7 +53,6 @@ class PeerTableModel : public QAbstractTableModel
 public:
     explicit PeerTableModel(interfaces::Node& node, QObject* parent);
     ~PeerTableModel();
-    const CNodeCombinedStats *getNodeStats(int idx);
     int getRowByNodeId(NodeId nodeid);
     void startAutoRefresh();
     void stopAutoRefresh();