[cleanup] Split ForOf and ForIn AST nodes apart as they share little

src/ast/ast-expression-rewriter.cc

Index: src/ast/ast-expression-rewriter.cc
diff --git a/src/ast/ast-expression-rewriter.cc b/src/ast/ast-expression-rewriter.cc
index edee91d3a19d7164c7ca80b3dccce60218f67501..b39f7f1f0cb32617408fcef5ac09e5cadecadb35 100644
--- a/src/ast/ast-expression-rewriter.cc
+++ b/src/ast/ast-expression-rewriter.cc
@@ -169,12 +169,10 @@ void AstExpressionRewriter::VisitForInStatement(ForInStatement* node) {
 
 
 void AstExpressionRewriter::VisitForOfStatement(ForOfStatement* node) {
-  AST_REWRITE_PROPERTY(Expression, node, each);
   AST_REWRITE_PROPERTY(Expression, node, assign_iterator);
   AST_REWRITE_PROPERTY(Expression, node, next_result);
   AST_REWRITE_PROPERTY(Expression, node, result_done);
   AST_REWRITE_PROPERTY(Expression, node, assign_each);
-  AST_REWRITE_PROPERTY(Expression, node, subject);
   AST_REWRITE_PROPERTY(Statement, node, body);
 }