Remove dead code for generated code coverage.

src/mips64/macro-assembler-mips64.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_MIPS_MACRO_ASSEMBLER_MIPS_H_
 #define V8_MIPS_MACRO_ASSEMBLER_MIPS_H_
 
 #include "src/assembler.h"
 #include "src/globals.h"
 #include "src/mips64/assembler-mips64.h"
@@ skipping 2039 matching lines @@
     pop(ra);
     ld(at, MemOperand(at, 6 * v8::internal::Assembler::kInstrSize));
   }
   jr(at);
   nop();  // Branch delay slot nop.
   for (size_t index = 0; index < case_count; ++index) {
     dd(GetLabelFunction(index));
   }
 }
 
-#ifdef GENERATED_CODE_COVERAGE
-#define CODE_COVERAGE_STRINGIFY(x) #x
-#define CODE_COVERAGE_TOSTRING(x) CODE_COVERAGE_STRINGIFY(x)
-#define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__)
-#define ACCESS_MASM(masm) masm->stop(__FILE_LINE__); masm->
-#else
 #define ACCESS_MASM(masm) masm->
-#endif
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_MIPS_MACRO_ASSEMBLER_MIPS_H_