Remove unused declarations.

src/bootstrapper.h

 // Copyright 2006-2008 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 62 matching lines @@
 
   // Traverses the pointers for memory management.
   static void Iterate(ObjectVisitor* v);
 
   // Accessor for the native scripts source code.
   static Handle<String> NativesSourceLookup(int index);
 
   // Tells whether bootstrapping is active.
   static bool IsActive() { return BootstrapperActive::IsActive(); }
 
-  // Encoding/decoding support for fixup flags.
-  class FixupFlagsUseCodeObject: public BitField<bool, 0, 1> {};
-  class FixupFlagsArgumentsCount: public BitField<uint32_t, 1, 32-1> {};
-
   // Support for thread preemption.
   static int ArchiveSpacePerThread();
   static char* ArchiveState(char* to);
   static char* RestoreState(char* from);
   static void FreeThreadResources();
 
   // This will allocate a char array that is deleted when V8 is shut down.
   // It should only be used for strictly finite allocations.
   static char* AllocateAutoDeletedArray(int bytes);
 
@@ skipping 16 matching lines @@
     return length_;
   }
  private:
   const char* data_;
   size_t length_;
 };
 
 }}  // namespace v8::internal
 
 #endif  // V8_BOOTSTRAPPER_H_