Remove SVG1.1 kerning property

Source/core/css/SVGCSSComputedStyleDeclaration.cpp

 /*
     Copyright (C) 2007 Eric Seidel <eric@webkit.org>
     Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
 
     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.
 
     This library is distributed in the hope that it will be useful,
@@ skipping 146 matching lines @@
                 return CSSPrimitiveValue::create(svgStyle->filterResource(), CSSPrimitiveValue::CSS_URI);
             return CSSPrimitiveValue::createIdentifier(CSSValueNone);
         case CSSPropertyFloodColor:
             return currentColorOrValidColor(*style, svgStyle->floodColor());
         case CSSPropertyLightingColor:
             return currentColorOrValidColor(*style, svgStyle->lightingColor());
         case CSSPropertyStopColor:
             return currentColorOrValidColor(*style, svgStyle->stopColor());
         case CSSPropertyFill:
             return adjustSVGPaintForCurrentColor(SVGPaint::create(svgStyle->fillPaintType(), svgStyle->fillPaintUri(), svgStyle->fillPaintColor()), *style);
-        case CSSPropertyKerning:
-            return SVGLength::toCSSPrimitiveValue(svgStyle->kerning());
         case CSSPropertyMarkerEnd:
             if (!svgStyle->markerEndResource().isEmpty())
                 return CSSPrimitiveValue::create(svgStyle->markerEndResource(), CSSPrimitiveValue::CSS_URI);
             return CSSPrimitiveValue::createIdentifier(CSSValueNone);
         case CSSPropertyMarkerMid:
             if (!svgStyle->markerMidResource().isEmpty())
                 return CSSPrimitiveValue::create(svgStyle->markerMidResource(), CSSPrimitiveValue::CSS_URI);
             return CSSPrimitiveValue::createIdentifier(CSSValueNone);
         case CSSPropertyMarkerStart:
             if (!svgStyle->markerStartResource().isEmpty())
@@ skipping 48 matching lines @@
     default:
         // If you crash here, it's because you added a css property and are not handling it
         // in either this switch statement or the one in CSSComputedStyleDelcaration::getPropertyCSSValue
         ASSERT_WITH_MESSAGE(0, "unimplemented propertyID: %d", propertyID);
     }
     WTF_LOG_ERROR("unimplemented propertyID: %d", propertyID);
     return nullptr;
 }
 
 }