Remove outdated comment in CSSPropertyParser

Source/core/css/parser/CSSPropertyParser.cpp

 /*
  * Copyright (C) 2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
  * Copyright (C) 2012 Intel Corporation. All rights reserved.
  *
@@ skipping 2174 matching lines @@
             } else if (equalIgnoringCase(val->function->name, "-webkit-image-set(")) {
                 parsedValue = parseImageSet(m_valueList);
                 if (!parsedValue)
                     return false;
             } else if (isGeneratedImageValue(val)) {
                 if (!parseGeneratedImage(m_valueList, parsedValue))
                     return false;
             } else
                 return false;
         } else if (val->unit == CSSPrimitiveValue::CSS_IDENT) {
-            // open-quote
-            // close-quote
-            // no-open-quote
-            // no-close-quote
-            // inherit
-            // FIXME: These are not yet implemented (http://bugs.webkit.org/show_bug.cgi?id=6503).
-            // none
-            // normal
             switch (val->id) {
             case CSSValueOpenQuote:
             case CSSValueCloseQuote:
             case CSSValueNoOpenQuote:
             case CSSValueNoCloseQuote:
             case CSSValueNone:
             case CSSValueNormal:
                 parsedValue = cssValuePool().createIdentifierValue(val->id);
             default:
                 break;
@@ skipping 5983 matching lines @@
         parsedValues->append(CSSPrimitiveValue::createIdentifier(CSSValueFill));
     if (!seenStroke)
         parsedValues->append(CSSPrimitiveValue::createIdentifier(CSSValueStroke));
     if (!seenMarkers)
         parsedValues->append(CSSPrimitiveValue::createIdentifier(CSSValueMarkers));
 
     return parsedValues.release();
 }
 
 } // namespace blink