diff --git a/src/link.cpp b/src/link.cpp
index 21e6045..1276904 100644
--- a/src/link.cpp
+++ b/src/link.cpp
@@ -1,5 +1,5 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
-/**
+/*
  * Copyright (c) 2013-2017 Regents of the University of California.
  *
  * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
@@ -61,8 +61,6 @@
   else {
     setContent(nullptr, 0);
   }
-
-  m_isDelSetDirty = true;
 }
 
 void
@@ -75,7 +73,6 @@
   }
 
   m_delList.wireDecode(getContent(), wantSort);
-  m_isDelSetDirty = true;
 }
 
 void
@@ -102,53 +99,4 @@
   return nErased > 0;
 }
 
-Link::PairInitializerListHelper::PairInitializerListHelper(std::initializer_list<std::pair<uint32_t, Name>> dels)
-{
-  for (const auto& p : dels) {
-    m_delList.insert(p.first, p.second, DelegationList::INS_REPLACE);
-  }
-}
-
-Link::Link(const Name& name, PairInitializerListHelper dels)
-  : Data(name)
-  , m_delList(std::move(dels.m_delList))
-{
-  encodeContent();
-}
-
-const Link::DelegationSet&
-Link::getDelegations() const
-{
-  if (m_isDelSetDirty) {
-    m_delSet.clear();
-    for (const auto& del : m_delList) {
-      m_delSet.emplace(static_cast<uint32_t>(del.preference), del.name);
-    }
-    m_isDelSetDirty = false;
-  }
-  return m_delSet;
-}
-
-Link::DelegationTuple
-Link::getDelegationFromWire(const Block& block, size_t index)
-{
-  Delegation del = Link(block, false).getDelegationList().at(index);
-  return std::make_tuple(static_cast<uint32_t>(del.preference), del.name);
-}
-
-ssize_t
-Link::findDelegationFromWire(const Block& block, const Name& delegationName)
-{
-  DelegationList dels = Link(block, false).getDelegationList();
-  auto i = std::find_if(dels.begin(), dels.end(),
-           [delegationName] (const Delegation& del) { return del.name == delegationName; });
-  return i == dels.end() ? -1 : std::distance(dels.begin(), i);
-}
-
-ssize_t
-Link::countDelegationsFromWire(const Block& block)
-{
-  return Link(block, false).getDelegationList().size();
-}
-
 } // namespace ndn