[cleanup] Drop handwritten KeyedStoreIC code

src/ic/x87/ic-compiler-x87.cc

-// 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.
-
-#if V8_TARGET_ARCH_X87
-
-#include "src/ic/ic.h"
-#include "src/ic/ic-compiler.h"
-
-namespace v8 {
-namespace internal {
-
-#define __ ACCESS_MASM(masm)
-
-
-void PropertyICCompiler::GenerateRuntimeSetProperty(
-    MacroAssembler* masm, LanguageMode language_mode) {
-  typedef StoreWithVectorDescriptor Descriptor;
-  STATIC_ASSERT(Descriptor::kStackArgumentsCount == 3);
-  // ----------- S t a t e -------------
-  //  -- esp[12] : value
-  //  -- esp[8]  : slot
-  //  -- esp[4]  : vector
-  //  -- esp[0]  : return address
-  // -----------------------------------
-  __ LoadParameterFromStack<Descriptor>(Descriptor::ValueRegister(),
-                                        Descriptor::kValue);
-
-  __ mov(Operand(esp, 12), Descriptor::ReceiverRegister());
-  __ mov(Operand(esp, 8), Descriptor::NameRegister());
-  __ mov(Operand(esp, 4), Descriptor::ValueRegister());
-  __ pop(ebx);
-  __ push(Immediate(Smi::FromInt(language_mode)));
-  __ push(ebx);  // return address
-
-  // Do tail-call to runtime routine.
-  __ TailCallRuntime(Runtime::kSetProperty);
-}
-
-
-#undef __
-}  // namespace internal
-}  // namespace v8
-
-#endif  // V8_TARGET_ARCH_X87