core: use ndn-cxx scheduler::ScopedEventId

refs #4698

Change-Id: I5ab56855fb22824e129fd7e3ccfb53174cf34f82
diff --git a/rib/rib-manager.cpp b/rib/rib-manager.cpp
index 35bc87f..d09420e 100644
--- a/rib/rib-manager.cpp
+++ b/rib/rib-manager.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2014-2018,  Regents of the University of California,
+ * Copyright (c) 2014-2019,  Regents of the University of California,
  *                           Arizona Board of Regents,
  *                           Colorado State University,
  *                           University Pierre & Marie Curie, Sorbonne University,
@@ -59,7 +59,6 @@
   , m_localhostValidator(face)
   , m_localhopValidator(face)
   , m_isLocalhopEnabled(false)
-  , m_activeFaceFetchEvent(m_scheduler)
 {
   registerCommandHandler<ndn::nfd::RibRegisterCommand>("register",
     bind(&RibManager::registerEntry, this, _2, _3, _4, _5));
@@ -139,7 +138,7 @@
 
   if (expires) {
     auto event = m_scheduler.scheduleEvent(*expires, [=] { m_rib.onRouteExpiration(name, route); });
-    route.setExpirationEvent(event, m_scheduler);
+    route.setExpirationEvent(event);
     NFD_LOG_TRACE("Scheduled unregistration at: " << *route.expires);
   }