Remove kernelUnitLength plumbing

Source/platform/graphics/filters/FEDiffuseLighting.h

 /*
  * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
  * Copyright (C) 2005 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 14 matching lines @@
 
 #include "platform/graphics/filters/FELighting.h"
 
 namespace blink {
 
 class LightSource;
 
 class PLATFORM_EXPORT FEDiffuseLighting : public FELighting {
 public:
     static PassRefPtrWillBeRawPtr<FEDiffuseLighting> create(Filter*, const Color&, float, float,
-        float, float, PassRefPtr<LightSource>);
+        PassRefPtr<LightSource>);
     ~FEDiffuseLighting() override;
 
     Color lightingColor() const;
     bool setLightingColor(const Color&);
 
     float surfaceScale() const;
     bool setSurfaceScale(float);
 
     float diffuseConstant() const;
     bool setDiffuseConstant(float);
 
-    float kernelUnitLengthX() const;
-    bool setKernelUnitLengthX(float);
-
-    float kernelUnitLengthY() const;
-    bool setKernelUnitLengthY(float);
-
     const LightSource* lightSource() const;
     void setLightSource(PassRefPtr<LightSource>);
 
     TextStream& externalRepresentation(TextStream&, int indention) const override;
 
 private:
-    FEDiffuseLighting(Filter*, const Color&, float, float, float, float, PassRefPtr<LightSource>);
+    FEDiffuseLighting(Filter*, const Color&, float, float, PassRefPtr<LightSource>);
 };
 
 } // namespace blink
 
 #endif // FEDiffuseLighting_h