Remove some unused functions in core

Source/core/css/parser/BisonCSSParser.h

Index: Source/core/css/parser/BisonCSSParser.h
diff --git a/Source/core/css/parser/BisonCSSParser.h b/Source/core/css/parser/BisonCSSParser.h
index b6df1292cb125cf2e82e4f06fc630ea1db799d19..858ec0ec077da810698a04fbba6592fe78721fc9 100644
--- a/Source/core/css/parser/BisonCSSParser.h
+++ b/Source/core/css/parser/BisonCSSParser.h
@@ -100,7 +100,6 @@ public:
     PassOwnPtr<CSSParserValueList> sinkFloatingValueList(CSSParserValueList*);
 
     CSSParserFunction* createFloatingFunction(const CSSParserString& name, PassOwnPtr<CSSParserValueList> args);
-    PassOwnPtr<CSSParserFunction> sinkFloatingFunction(CSSParserFunction*);
 
     CSSParserValue& sinkFloatingValue(CSSParserValue&);
 
@@ -289,9 +288,6 @@ private:
 
     OwnPtrWillBeMember<RuleSourceDataList> m_supportsRuleDataStack;
 
-    bool isLoggingErrors();
-    void logError(const String& message, const CSSParserLocation&);
-
     BisonCSSTokenizer m_tokenizer;
 };