[interpreter] Remove special "prototype" load in class literals.

src/compiler/bytecode-graph-builder.h

 // Copyright 2015 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_COMPILER_BYTECODE_GRAPH_BUILDER_H_
 #define V8_COMPILER_BYTECODE_GRAPH_BUILDER_H_
 
 #include "src/compiler.h"
 #include "src/compiler/bytecode-branch-analysis.h"
 #include "src/compiler/js-graph.h"
@@ skipping 23 matching lines @@
   // Get or create the node that represents the outer function closure.
   Node* GetFunctionClosure();
 
   // Get or create the node that represents the outer function context.
   Node* GetFunctionContext();
 
   // Get or create the node that represents the incoming new target value.
   Node* GetNewTarget();
 
   // Builder for accessing a (potentially immutable) object field.
-  Node* BuildLoadObjectField(Node* object, int offset);
   Node* BuildLoadImmutableObjectField(Node* object, int offset);
 
   // Builder for accessing type feedback vector.
   Node* BuildLoadFeedbackVector();
 
   // Builder for loading the a native context field.
   Node* BuildLoadNativeContextField(int index);
 
   // Helper function for creating a pair containing type feedback vector and
   // a feedback slot.
@@ skipping 199 matching lines @@
   ZoneVector<Node*> exit_controls_;
 
   DISALLOW_COPY_AND_ASSIGN(BytecodeGraphBuilder);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_BYTECODE_GRAPH_BUILDER_H_