Remove some ascii checks in advance of latin-1 release

src/v8utils.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 261 matching lines @@
   MemoryMappedExternalResource(const char* filename,
                                bool remove_file_on_cleanup);
   virtual ~MemoryMappedExternalResource();
 
   virtual const char* data() const { return data_; }
   virtual size_t length() const { return length_; }
 
   bool exists() const { return file_ != NULL; }
   bool is_empty() const { return length_ == 0; }
 
-  bool EnsureIsAscii(bool abort_if_failed) const;
-  bool EnsureIsAscii() const { return EnsureIsAscii(true); }
-  bool IsAscii() const { return EnsureIsAscii(false); }
-
  private:
   void Init(const char* filename);
 
   char* filename_;
   OS::MemoryMappedFile* file_;
 
   const char* data_;
   size_t length_;
   bool remove_file_on_cleanup_;
 };
 
 class StringBuilder : public SimpleStringBuilder {
  public:
   explicit StringBuilder(int size) : SimpleStringBuilder(size) { }
   StringBuilder(char* buffer, int size) : SimpleStringBuilder(buffer, size) { }
 
   // Add formatted contents to the builder just like printf().
   void AddFormatted(const char* format, ...);
 
   // Add formatted contents like printf based on a va_list.
   void AddFormattedList(const char* format, va_list list);
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(StringBuilder);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_V8UTILS_H_