waf-tools: remove FRIEND_TYPENAME check
It becomes unnecessary after dropping Ubuntu 12.04 build support.
refs #3599
Change-Id: I2b2ed8b38b8b7f5ec28dc32cb81bd04adfad4f88
diff --git a/src/util/signal-signal.hpp b/src/util/signal-signal.hpp
index ca6dcf1..7756eae 100644
--- a/src/util/signal-signal.hpp
+++ b/src/util/signal-signal.hpp
@@ -1,6 +1,6 @@
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/**
- * Copyright (c) 2013-2015 Regents of the University of California.
+ * Copyright (c) 2013-2016 Regents of the University of California.
*
* This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
*
@@ -95,18 +95,7 @@
operator()(const TArgs&...args, const DummyExtraArg&);
// make Owner a friend of Signal<Owner, ...> so that API for owner can be called
-#if NDN_CXX_HAVE_CXX_FRIEND_TYPENAME
friend Owner;
-#elif NDN_CXX_HAVE_CXX_FRIEND_TYPENAME_WRAPPER
- template<typename T>
- struct TypeWrapper
- {
- typedef T Type;
- }; // http://stackoverflow.com/a/5608542/3729203
- friend class TypeWrapper<Owner>::Type;
-#else
-# error "cannot declare Owner as friend"
-#endif
private: // internal implementation
typedef Signal<Owner, TArgs...> Self;