delete unuseful codes

OTSCPP/OTSImagePro/FieldMgr.cpp

@@ -378,7 +378,7 @@ namespace OTSIMGPROC {
 		sizeImage.cx = dScanFiledSizeX;
 		sizeImage.cy = dScanFiledSizeY;
 		// pixel size (micros)
-		double dPixelSize = (double)dScanFiledSizeX / (double)sizeImage.cx;
+		//double dPixelSize = (double)dScanFiledSizeX / (double)ImageSizeByPixel.cx;
 
 		// the measure domain rectangle 
 		CRect rectMeasureDomain = m_pMeasureArea->GetDomainRect();