Delete core/asserts.hpp and use ndn-cxx's util/concepts.hpp instead

Change-Id: I13a3460c1c3a90ea0fdca3d8212267353f72af4f

daemon/table/pit-iterator.cpp

@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
-/**
- * Copyright (c) 2014-2016,  Regents of the University of California,
+/*
+ * Copyright (c) 2014-2018,  Regents of the University of California,
  *                           Arizona Board of Regents,
  *                           Colorado State University,
  *                           University Pierre & Marie Curie, Sorbonne University,
@@ -24,12 +24,13 @@
  */
 
 #include "pit-iterator.hpp"
-#include "core/asserts.hpp"
+
+#include <ndn-cxx/util/concepts.hpp>
 
 namespace nfd {
 namespace pit {
 
-NFD_ASSERT_FORWARD_ITERATOR(Iterator);
+NDN_CXX_ASSERT_FORWARD_ITERATOR(Iterator);
 
 Iterator::Iterator(const NameTree::const_iterator& ntIt, size_t iPitEntry)
   : m_ntIt(ntIt)