[interpreter] Remove duped control scope in ForOfStatement.

src/interpreter/bytecode-generator.cc

 // 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.
 
 #include "src/interpreter/bytecode-generator.h"
 
 #include "src/ast/scopes.h"
 #include "src/code-stubs.h"
 #include "src/compiler.h"
 #include "src/interpreter/bytecode-flags.h"
@@ skipping 1148 matching lines @@
   builder()->ForInStep(index);
   builder()->StoreAccumulatorInRegister(index);
   loop_builder.JumpToHeader();
   loop_builder.EndLoop();
   builder()->Bind(&subject_null_label);
   builder()->Bind(&subject_undefined_label);
 }
 
 void BytecodeGenerator::VisitForOfStatement(ForOfStatement* stmt) {
   LoopBuilder loop_builder(builder());
-  ControlScopeForIteration control_scope(this, stmt, &loop_builder);
 
   builder()->SetExpressionAsStatementPosition(stmt->assign_iterator());
   VisitForEffect(stmt->assign_iterator());
 
   VisitIterationHeader(stmt, &loop_builder);
   builder()->SetExpressionAsStatementPosition(stmt->next_result());
   VisitForEffect(stmt->next_result());
   VisitForAccumulatorValue(stmt->result_done());
   loop_builder.BreakIfTrue();
 
@@ skipping 1998 matching lines @@
   return execution_context()->scope()->language_mode();
 }
 
 int BytecodeGenerator::feedback_index(FeedbackVectorSlot slot) const {
   return TypeFeedbackVector::GetIndex(slot);
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8