Fix a bug in deoptimization after logical expressions in an effect context.

src/hydrogen.h

Index: src/hydrogen.h
diff --git a/src/hydrogen.h b/src/hydrogen.h
index 6d287efdbb06f973d55d49203f364778691505a1..c69473e1b312e3b54c1681243cbd53a09c6c28a1 100644
--- a/src/hydrogen.h
+++ b/src/hydrogen.h
@@ -210,9 +210,6 @@ class HSubgraph: public ZoneObject {
 
   void PreProcessOsrEntry(IterationStatement* statement);
 
-  void AppendOptional(HSubgraph* graph,
-                      bool on_true_branch,
-                      HValue* boolean_value);
   void AppendJoin(HSubgraph* then_graph, HSubgraph* else_graph, AstNode* node);
   void AppendWhile(HSubgraph* condition,
                    HSubgraph* body,