some merge got these two lines re-added (they are in opcode.h and rcode.h now)

git-svn-id: svn://bind10.isc.org/svn/bind10/branches/trac327@3817 e5f2f494-b856-4b98-b285-d166d9295462

src/lib/dns/message.h

@@ -525,8 +525,6 @@ private:
 /// that originated the asynchronous call falls out of scope.
 typedef boost::shared_ptr<Message> MessagePtr;
 
-std::ostream& operator<<(std::ostream& os, const Opcode& opcode);
-std::ostream& operator<<(std::ostream& os, const Rcode& rcode);
 std::ostream& operator<<(std::ostream& os, const Message& message);
 }
 }