[turbofan] Remove obsolete BuildLoadBuiltinsObject.

src/compiler/ast-graph-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/ast-graph-builder.h"
 
 #include "src/compiler.h"
 #include "src/compiler/ast-loop-assignment-analyzer.h"
 #include "src/compiler/control-builders.h"
 #include "src/compiler/js-type-feedback.h"
@@ skipping 3719 matching lines @@
 }
 
 
 Node* AstGraphBuilder::BuildLoadImmutableObjectField(Node* object, int offset) {
   return graph()->NewNode(jsgraph()->machine()->Load(kMachAnyTagged), object,
                           jsgraph()->IntPtrConstant(offset - kHeapObjectTag),
                           graph()->start(), graph()->start());
 }
 
 
-Node* AstGraphBuilder::BuildLoadBuiltinsObject() {
-  Node* global = BuildLoadGlobalObject();
-  Node* builtins =
-      BuildLoadObjectField(global, JSGlobalObject::kBuiltinsOffset);
-  return builtins;
-}
-
-
 Node* AstGraphBuilder::BuildLoadGlobalObject() {
   const Operator* load_op =
       javascript()->LoadContext(0, Context::GLOBAL_OBJECT_INDEX, true);
   return NewNode(load_op, GetFunctionContext());
 }
 
 
 Node* AstGraphBuilder::BuildLoadNativeContextField(int index) {
   Node* global = BuildLoadGlobalObject();
   Node* native_context =
@@ skipping 544 matching lines @@
     // Phi does not exist yet, introduce one.
     value = NewPhi(inputs, value, control);
     value->ReplaceInput(inputs - 1, other);
   }
   return value;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8