[es6] Consistently use %_GetSuperConstructor to implement super calls.

src/full-codegen/full-codegen.h

Index: src/full-codegen/full-codegen.h
diff --git a/src/full-codegen/full-codegen.h b/src/full-codegen/full-codegen.h
index 904e30e1c45f57967a627c14925ddae02b6a0201..b0e8ef39314889fdee6b7d53dcf5b5b51b3534f8 100644
--- a/src/full-codegen/full-codegen.h
+++ b/src/full-codegen/full-codegen.h
@@ -630,8 +630,6 @@ class FullCodeGenerator: public AstVisitor {
   void EmitSetHomeObjectAccumulator(Expression* initializer, int offset,
                                     FeedbackVectorSlot slot);
 
-  void EmitLoadSuperConstructor(SuperCallReference* super_call_ref);
-
   void CallIC(Handle<Code> code,
               TypeFeedbackId id = TypeFeedbackId::None());