Legacy cleanup, part 2 (#3659)

* Legacy cleanup, part 2

There are still things that can be removed, those will be likely done in part three:
`The Return of the Cleanup` :)

Signed-off-by: nemerle <96597+nemerle@users.noreply.github.com>

* Fix windows build

Somehow there were some unfixed errors from enabled warnings?
I'm unsure if I've pulled repo in unstable state, or those were somehow
missed.

Signed-off-by: nemerle <96597+nemerle@users.noreply.github.com>

Code/Editor/Util/DynamicArray2D.cpp

@@ -62,11 +62,6 @@ CDynamicArray2D::~CDynamicArray2D()
 }
 
 
-void CDynamicArray2D::GetMemoryUsage(ICrySizer* pSizer)
-{
-    pSizer->Add((char*)this, m_Dimension1 * m_Dimension2 * sizeof(float) + sizeof(*this));
-}
-
 void CDynamicArray2D::ScaleImage(CDynamicArray2D* pDestination)
 {
     ////////////////////////////////////////////////////////////////////////

Code/Editor/Util/DynamicArray2D.h

@@ -24,8 +24,6 @@ public:
     virtual ~CDynamicArray2D();
     //
     void ScaleImage(CDynamicArray2D* pDestination);
-    //
-    void GetMemoryUsage(ICrySizer* pSizer);
 
 
     float**                    m_Array;                     //

Code/Editor/Util/GdiUtil.cpp

@@ -28,7 +28,7 @@ QColor ScaleColor(const QColor& c, float aScale)
     const float g = static_cast<float>(aColor.green()) * aScale;
     const float b = static_cast<float>(aColor.blue()) * aScale;
 
-    return QColor(CLAMP(static_cast<int>(r), 0, 255), CLAMP(static_cast<int>(g), 0, 255), CLAMP(static_cast<int>(b), 0, 255));
+    return QColor(AZStd::clamp(static_cast<int>(r), 0, 255), AZStd::clamp(static_cast<int>(g), 0, 255), AZStd::clamp(static_cast<int>(b), 0, 255));
 }
 
 CAlphaBitmap::CAlphaBitmap()

Code/Editor/Util/ImageHistogram.cpp

@@ -105,7 +105,7 @@ void CImageHistogram::ComputeHistogram(BYTE* pImageData, UINT aWidth, UINT aHeig
         ++m_count[3][a];
 
         lumIndex = (r + b + g) / 3;
-        lumIndex = CLAMP(lumIndex, 0, kNumColorLevels - 1);
+        lumIndex = AZStd::clamp(lumIndex, 0, kNumColorLevels - 1);
         ++m_lumCount[lumIndex];
 
         if (m_maxCount[0] < m_count[0][r])