[ic] Delete old KeyedLoadIC code

src/ic/ic.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.
 
 #include "src/ic/ic.h"
 
 #include "src/accessors.h"
 #include "src/api-arguments-inl.h"
 #include "src/api.h"
 #include "src/arguments.h"
@@ skipping 504 matching lines @@
                       Address constant_pool) {
   DCHECK(CodeStub::GetMajorKey(target) == CodeStub::CompareIC);
   CompareICStub stub(target->stub_key(), isolate);
   // Only clear CompareICs that can retain objects.
   if (stub.state() != CompareICState::KNOWN_RECEIVER) return;
   SetTargetAtAddress(address, GetRawUninitialized(isolate, stub.op()),
                      constant_pool);
   PatchInlinedSmiCode(isolate, address, DISABLE_INLINED_SMI_CHECK);
 }
 
-
-// static
-Handle<Code> KeyedLoadIC::ChooseMegamorphicStub(Isolate* isolate,
-                                                ExtraICState extra_state) {
-  // TODO(ishell): remove extra_ic_state
-  if (FLAG_compiled_keyed_generic_loads) {
-    return KeyedLoadGenericStub(isolate).GetCode();
-  } else {
-    return isolate->builtins()->KeyedLoadIC_Megamorphic();
-  }
-}
-
-
 static bool MigrateDeprecated(Handle<Object> object) {
   if (!object->IsJSObject()) return false;
   Handle<JSObject> receiver = Handle<JSObject>::cast(object);
   if (!receiver->map()->is_deprecated()) return false;
   JSObject::MigrateInstance(Handle<JSObject>::cast(object));
   return true;
 }
 
 void IC::ConfigureVectorState(IC::State new_state, Handle<Object> key) {
   DCHECK(UseVector());
@@ skipping 2413 matching lines @@
     DCHECK_EQ(LookupIterator::INTERCEPTOR, it.state());
     it.Next();
     ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result,
                                        Object::GetProperty(&it));
   }
 
   return *result;
 }
 }  // namespace internal
 }  // namespace v8