rm question from code

GUI/Models/InstrumentModel.h

@@ -31,7 +31,7 @@ public:
     QVector<SessionItem*> nonXMLItems() const override;
     virtual void readFrom(QXmlStreamReader* reader, MessageService* messageService = 0) override;
 
-    QVector<InstrumentItem*> instrumentItems() const; // still needed?
+    QVector<InstrumentItem*> instrumentItems() const;
     QVector<Instrument2DItem*> instrument2DItems() const;
 
     InstrumentItem* findInstrumentById(const QString& instrumentId) const;