Remove unused thread locals from debugger.

src/x64/frames-x64.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_X64_FRAMES_X64_H_
 #define V8_X64_FRAMES_X64_H_
 
 namespace v8 {
 namespace internal {
 
 const int kNumRegs = 16;
 const RegList kJSCallerSaved =
     1 << 0 |  // rax
     1 << 1 |  // rcx
     1 << 2 |  // rdx
     1 << 3 |  // rbx - used as a caller-saved register in JavaScript code
     1 << 7;   // rdi - callee function
 
 const int kNumJSCallerSaved = 5;
 
-typedef Object* JSCallerSavedBuffer[kNumJSCallerSaved];
-
 // Number of registers for which space is reserved in safepoints.
 const int kNumSafepointRegisters = 16;
 
 // ----------------------------------------------------
 
 class EntryFrameConstants : public AllStatic {
  public:
 #ifdef _WIN64
   static const int kCalleeSaveXMMRegisters = 10;
   static const int kXMMRegisterSize = 16;
@@ skipping 81 matching lines @@
     // Zero out the high-32 bit of FP for x32 port.
     Memory::Address_at(slot + kPointerSize) = 0;
   }
   Memory::Address_at(slot) = fp;
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_FRAMES_X64_H_