RegExp macro assembler clean up.

src/regexp-macro-assembler-irregexp.h

Index: src/regexp-macro-assembler-irregexp.h
diff --git a/src/regexp-macro-assembler-irregexp.h b/src/regexp-macro-assembler-irregexp.h
index 4bc29809bd6b901c887467161949868f64fdfbc4..3569d8b030e9f0e9de548a91e3a271367f43a794 100644
--- a/src/regexp-macro-assembler-irregexp.h
+++ b/src/regexp-macro-assembler-irregexp.h
@@ -103,10 +103,6 @@ class RegExpMacroAssemblerIrregexp: public RegExpMacroAssembler {
   virtual void CheckNotBackReference(int start_reg, Label* on_no_match);
   virtual void CheckNotBackReferenceIgnoreCase(int start_reg,
                                                Label* on_no_match);
-  virtual void CheckCharacters(Vector<const uc16> str,
-                               int cp_offset,
-                               Label* on_failure,
-                               bool check_end_of_string);
   virtual void IfRegisterLT(int register_index, int comparand, Label* if_lt);
   virtual void IfRegisterGE(int register_index, int comparand, Label* if_ge);
   virtual void IfRegisterEqPos(int register_index, Label* if_eq);