Remove SVG1.1 kerning property

Source/core/rendering/svg/SVGTextLayoutEngineSpacing.h

Index: Source/core/rendering/svg/SVGTextLayoutEngineSpacing.h
diff --git a/Source/core/rendering/svg/SVGTextLayoutEngineSpacing.h b/Source/core/rendering/svg/SVGTextLayoutEngineSpacing.h
index 3db58467652c9898bbabe8b118af1e8526cd1a8d..7973d28971cf36b52a86ae1705c2bae6b099af59 100644
--- a/Source/core/rendering/svg/SVGTextLayoutEngineSpacing.h
+++ b/Source/core/rendering/svg/SVGTextLayoutEngineSpacing.h
@@ -28,14 +28,14 @@ class Font;
 class SVGRenderStyle;
 class SVGElement;
 
-// Helper class used by SVGTextLayoutEngine to handle 'kerning' / 'letter-spacing' and 'word-spacing'.
+// Helper class used by SVGTextLayoutEngine to handle 'letter-spacing' and 'word-spacing'.
 class SVGTextLayoutEngineSpacing {
     WTF_MAKE_NONCOPYABLE(SVGTextLayoutEngineSpacing);
 public:
     SVGTextLayoutEngineSpacing(const Font&);
 
     float calculateSVGKerning(bool isVerticalText, Glyph currentGlyph);
-    float calculateCSSKerningAndSpacing(const SVGRenderStyle*, SVGElement* lengthContext, UChar currentCharacter);
+    float calculateCSSSpacing(UChar currentCharacter);
 
 private:
     const Font& m_font;