Cleanup access to guarded_fields

runtime/vm/flow_graph_builder.h

Index: runtime/vm/flow_graph_builder.h
diff --git a/runtime/vm/flow_graph_builder.h b/runtime/vm/flow_graph_builder.h
index 27062d6c9555f60044eea9fac09f5a7e4ab0da2a..474bc4f89d9a1f2f96dc618be8399f9b92d1533c 100644
--- a/runtime/vm/flow_graph_builder.h
+++ b/runtime/vm/flow_graph_builder.h
@@ -153,10 +153,6 @@ class FlowGraphBuilder : public ValueObject {
   bool IsInlining() const { return (exit_collector_ != NULL); }
   InlineExitCollector* exit_collector() const { return exit_collector_; }
 
-  ZoneGrowableArray<const Field*>* guarded_fields() const {
-    return parsed_function_.guarded_fields();
-  }
-
   ZoneGrowableArray<const LibraryPrefix*>* deferred_prefixes() const {
     return parsed_function_.deferred_prefixes();
   }