Remove redundant/unnecessary variables and checks in ParseForStatement

src/ast/ast.h

Index: src/ast/ast.h
diff --git a/src/ast/ast.h b/src/ast/ast.h
index 3bc5690f033a764018c4c3b824526fe61bb8cb16..c28247049db645a13a662fe622da34dbc8b66779 100644
--- a/src/ast/ast.h
+++ b/src/ast/ast.h
@@ -831,6 +831,10 @@ class ForEachStatement : public IterationStatement {
                                  FeedbackVectorSlotCache* cache) override;
   FeedbackVectorSlot EachFeedbackSlot() const { return each_slot_; }
 
+  static const char* VisitModeString(VisitMode mode) {
+    return mode == ITERATE ? "for-of" : "for-in";
+  }
+
  protected:
   ForEachStatement(Zone* zone, ZoneList<const AstRawString*>* labels, int pos)
       : IterationStatement(zone, labels, pos), each_(NULL), subject_(NULL) {}