removed unused member variable

VistaCoreLibs/VistaDataFlowNet/VdfnDriverSensorNode.h

@@ -106,8 +106,7 @@ private:
 	VistaDeviceSensor *m_pSensor;
 	HistoryPort        *m_pHistoryPort;
 
-	mutable VistaType::uint32	m_nLastUpdateIdx,
-								m_nOldScore; // is updated in CalcUpdateNeededScore()
+	mutable VistaType::uint32	m_nLastUpdateIdx;
 	unsigned int    m_nOldMeasureCount;
 	mutable VistaType::microtime m_nLastUpdateTsFromReadState;
 };