[compiler] Remove bailout in ast-numbering's VisitYield.

src/ast/ast-numbering.cc

Index: src/ast/ast-numbering.cc
diff --git a/src/ast/ast-numbering.cc b/src/ast/ast-numbering.cc
index 4f9ffb2133ff54954c1a1819e1be6c296061c54e..dd6ce4a6027214f59a0c83a49f74535c66060b8b 100644
--- a/src/ast/ast-numbering.cc
+++ b/src/ast/ast-numbering.cc
@@ -220,7 +220,6 @@ void AstNumberingVisitor::VisitYield(Yield* node) {
   node->set_yield_id(yield_count_);
   yield_count_++;
   IncrementNodeCount();
-  DisableOptimization(kYield);
   ReserveFeedbackSlots(node);
   node->set_base_id(ReserveIdRange(Yield::num_ids()));
   Visit(node->generator_object());
@@ -580,6 +579,9 @@ bool AstNumberingVisitor::Renumber(FunctionLiteral* node) {
   }
 
   if (IsGeneratorFunction(node->kind()) || IsAsyncFunction(node->kind())) {
+    // TODO(neis): We may want to allow Turbofan optimization here if
+    // --turbo-from-bytecode is set and we know that Ignition is used.
+    // Unfortunately we can't express that here.
     DisableOptimization(kGenerator);
   }