Drop deprecated method for backing store from AccessBuilder.

src/compiler/access-builder.cc

 // Copyright 2014 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/compiler/access-builder.h"
 #include "src/types-inl.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
@@ skipping 40 matching lines @@
 }
 
 
 // static
 ElementAccess AccessBuilder::ForFixedArrayElement() {
   return {kTaggedBase, FixedArray::kHeaderSize, Type::Any(), kMachAnyTagged};
 }
 
 
 // static
-ElementAccess AccessBuilder::ForBackingStoreElement(MachineType rep) {
-  return {kUntaggedBase, kNonHeapObjectHeaderSize - kHeapObjectTag, Type::Any(),
-          rep};
-}
-
-
-// static
 ElementAccess AccessBuilder::ForTypedArrayElement(ExternalArrayType type,
                                                   bool is_external) {
   BaseTaggedness taggedness = is_external ? kUntaggedBase : kTaggedBase;
   int header_size = is_external ? 0 : FixedTypedArrayBase::kDataOffset;
   switch (type) {
     case kExternalInt8Array:
       return {taggedness, header_size, Type::Signed32(), kMachInt8};
     case kExternalUint8Array:
     case kExternalUint8ClampedArray:
       return {taggedness, header_size, Type::Unsigned32(), kMachUint8};
@@ skipping 10 matching lines @@
     case kExternalFloat64Array:
       return {taggedness, header_size, Type::Number(), kRepFloat64};
   }
   UNREACHABLE();
   return {kUntaggedBase, 0, Type::None(), kMachNone};
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8