Remove broken %_Log functionality.

src/x64/macro-assembler-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_MACRO_ASSEMBLER_X64_H_
 #define V8_X64_MACRO_ASSEMBLER_X64_H_
 
 #include "assembler.h"
 #include "frames.h"
 #include "v8globals.h"
@@ skipping 1187 matching lines @@
   // Try to get function prototype of a function and puts the value in
   // the result register. Checks that the function really is a
   // function and jumps to the miss label if the fast checks fail. The
   // function register will be untouched; the other register may be
   // clobbered.
   void TryGetFunctionPrototype(Register function,
                                Register result,
                                Label* miss,
                                bool miss_on_bound_function = false);
 
-  // Generates code for reporting that an illegal operation has
-  // occurred.
-  void IllegalOperation(int num_arguments);
-
   // Picks out an array index from the hash field.
   // Register use:
   //   hash - holds the index's hash. Clobbered.
   //   index - holds the overwritten index on exit.
   void IndexFromHash(Register hash, Register index);
 
   // Find the function context up the context chain.
   void LoadContext(Register dst, int context_chain_length);
 
   // Conditionally load the cached Array transitioned map of type
@@ skipping 377 matching lines @@
     masm->popfq();                                                           \
   }                                                                          \
   masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_MACRO_ASSEMBLER_X64_H_