Removing webkit-prefixed image data HD APIs from 2D canvas

Source/core/frame/UseCounter.cpp

Index: Source/core/frame/UseCounter.cpp
diff --git a/Source/core/frame/UseCounter.cpp b/Source/core/frame/UseCounter.cpp
index 10b8ec01cd41c0f0343012547f1c3dcd33b09822..1f4613833413cf03c89867fc998f2d2b06e45d6a 100644
--- a/Source/core/frame/UseCounter.cpp
+++ b/Source/core/frame/UseCounter.cpp
@@ -673,12 +673,6 @@ String UseCounter::deprecationMessage(Feature feature)
     case HTMLSourceElementMedia:
         return "'HTMLSourceElement.media' is deprecated. This attribute doesn't do anything.";
 
-    case PrefixedGetImageDataHD:
-        return "'CanvasRenderingContext2D.webkitGetImageDataHD' is deprecated. Please use getImageData instead.";
-
-    case PrefixedPutImageDataHD:
-        return "'CanvasRenderingContext2D.webkitPutImageDataHD' is deprecated. Please use putImageData instead.";
-
     case ShadowRootApplyAuthorStyles:
         return "'ShadowRoot.applyAuthorStyles' is deprecated.";