Revert of [KeyedLoadIC] Support Smi "handlers" for element loads

src/ic/handler-configuration.h

-// Copyright 2016 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_IC_HANDLER_CONFIGURATION_H_
-#define V8_IC_HANDLER_CONFIGURATION_H_
-
-#include "src/elements-kind.h"
-#include "src/globals.h"
-#include "src/utils.h"
-
-namespace v8 {
-namespace internal {
-
-enum LoadHandlerType {
-  kLoadICHandlerForElements = 0,
-  kLoadICHandlerForProperties = 1
-};
-
-class LoadHandlerTypeBit : public BitField<bool, 0, 1> {};
-
-// Encoding for configuration Smis for property loads:
-class FieldOffsetIsInobject
-    : public BitField<bool, LoadHandlerTypeBit::kNext, 1> {};
-class FieldOffsetIsDouble
-    : public BitField<bool, FieldOffsetIsInobject::kNext, 1> {};
-class FieldOffsetOffset : public BitField<int, FieldOffsetIsDouble::kNext, 27> {
-};
-// Make sure we don't overflow into the sign bit.
-STATIC_ASSERT(FieldOffsetOffset::kNext <= kSmiValueSize - 1);
-
-// Encoding for configuration Smis for elements loads:
-class KeyedLoadIsJsArray : public BitField<bool, LoadHandlerTypeBit::kNext, 1> {
-};
-class KeyedLoadConvertHole
-    : public BitField<bool, KeyedLoadIsJsArray::kNext, 1> {};
-class KeyedLoadElementsKind
-    : public BitField<ElementsKind, KeyedLoadConvertHole::kNext, 8> {};
-// Make sure we don't overflow into the sign bit.
-STATIC_ASSERT(KeyedLoadElementsKind::kNext <= kSmiValueSize - 1);
-
-}  // namespace internal
-}  // namespace v8
-
-#endif  // V8_IC_HANDLER_CONFIGURATION_H_