ENH: (Visu Refactoring) Removing upper and lower clamp from image layer object

Code/VisuRefac/otbImageLayer.h

@@ -89,14 +89,6 @@ public:
   itkSetObjectMacro(HistogramList,HistogramListType);
   itkGetObjectMacro(HistogramList,HistogramListType);
 
-  /** Set/Get the upper clamp values */
-  itkSetMacro(UpperClamp,PixelType);
-  itkGetMacro(UpperClamp,PixelType);
-
-  /** Set/Get the lower clamp values */
-  itkSetMacro(LowerClamp,PixelType);
-  itkGetMacro(LowerClamp,PixelType);
-
   /** Set/Get the rendering function */
   itkSetObjectMacro(RenderingFunction,RenderingFunctionType);
   itkGetObjectMacro(RenderingFunction,RenderingFunctionType);
@@ -125,12 +117,6 @@ private:
   /** Histogram list */
   HistogramListPointerType m_HistogramList;
 
-  /** Upper clamping values */
-  PixelType                m_UpperClamp;
-
-  /** Lower clamping values */
-  PixelType                m_LowerClamp;
-
   /** Rendering function */
   RenderingFunctionPointerType m_RenderingFunction;