-deleted unused variable

bbiwarg/Images/ConfidenceImage.cs

@@ -14,7 +14,6 @@ namespace bbiwarg.Images
     {
         public Image<Gray, Int16> Image { get; private set; }
         public Image<Gray, byte> Mask { get; private set; }
-        private OutputImage outputImage;
 
         public ConfidenceImage(Image<Gray, Int16> image)
         {