src: Remove unnecessary uses of boost::cref in make_shared and replace boost::cref/boost::ref with just cref/ref

In some cases, due to argument-dependent lookup, it is necessary to use
ndn::ref, instead of just ref.

Change-Id: I682180a007609535855f77511b49622154ad4f11
Refs: #1591
diff --git a/rib/rib-manager.cpp b/rib/rib-manager.cpp
index 73ef71d..f4fc9c8 100644
--- a/rib/rib-manager.cpp
+++ b/rib/rib-manager.cpp
@@ -57,14 +57,8 @@
                      ),
   };
 
-inline static void
-NullDeleter(boost::asio::io_service* variable)
-{
-  // do nothing
-}
-
 RibManager::RibManager()
-  : m_face(shared_ptr<boost::asio::io_service>(&getGlobalIoService(), &NullDeleter))
+  : m_face(getGlobalIoService())
   , m_nfdController(new ndn::nfd::Controller(m_face))
   , m_localhostValidator(m_face)
   , m_localhopValidator(m_face)
@@ -96,7 +90,7 @@
     }
 
   NFD_LOG_INFO("Start monitoring face create/destroy events");
-  m_faceMonitor.addSubscriber(boost::bind(&RibManager::onNotification, this, _1));
+  m_faceMonitor.addSubscriber(bind(&RibManager::onNotification, this, _1));
   m_faceMonitor.startNotifications();
 }