Remove obsolete bug TODO

src/x64/codegen-x64.cc

 // Copyright 2010 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 3053 matching lines @@
     Load(node->expression());
     switch (op) {
       case Token::NOT:
       case Token::DELETE:
       case Token::TYPEOF:
         UNREACHABLE();  // handled above
         break;
 
       case Token::SUB: {
         GenericUnaryOpStub stub(Token::SUB, overwrite);
-        // TODO(1222589): remove dependency of TOS being cached inside stub
         Result operand = frame_->Pop();
         Result answer = frame_->CallStub(&stub, &operand);
         frame_->Push(&answer);
         break;
       }
 
       case Token::BIT_NOT: {
         // Smi check.
         JumpTarget smi_label;
         JumpTarget continue_label;
@@ skipping 6390 matching lines @@
   // Call the function from C++.
   return FUNCTION_CAST<ModuloFunction>(buffer);
 }
 
 #endif
 
 
 #undef __
 
 } }  // namespace v8::internal