[ignition] desugar GetIterator() via bytecode rather than via AST

src/parsing/parser.h

Index: src/parsing/parser.h
diff --git a/src/parsing/parser.h b/src/parsing/parser.h
index 88d4d594fceded1b2020cabd91050d6085a9b2f5..38a35d862bf5620dbe63ffc3bf82559dc4d76a68 100644
--- a/src/parsing/parser.h
+++ b/src/parsing/parser.h
@@ -450,8 +450,6 @@ class V8_EXPORT_PRIVATE Parser : public NON_EXPORTED_BASE(ParserBase<Parser>) {
   Expression* BuildIteratorNextResult(Expression* iterator, Variable* result,
                                       int pos);
 
-  Expression* GetIterator(Expression* iterable, int pos);
-
   // Initialize the components of a for-in / for-of statement.
   Statement* InitializeForEachStatement(ForEachStatement* stmt,
                                         Expression* each, Expression* subject,