lp: fold field-info.{cpp,hpp} into packet.cpp

Change-Id: I1a328cb12bb3d1755d440e490c4d00c222d5e873
diff --git a/src/lp/cache-policy.hpp b/src/lp/cache-policy.hpp
index 5c5c5d1..45b9493 100644
--- a/src/lp/cache-policy.hpp
+++ b/src/lp/cache-policy.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) 2013-2017 Regents of the University of California.
  *
  * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
  *
@@ -24,11 +24,7 @@
 #ifndef NDN_CXX_LP_CACHE_POLICY_HPP
 #define NDN_CXX_LP_CACHE_POLICY_HPP
 
-#include "../common.hpp"
-#include "../tag.hpp"
 #include "../encoding/encoding-buffer.hpp"
-#include "../encoding/block-helpers.hpp"
-
 #include "tlv.hpp"
 
 namespace ndn {