mgmt+rib: use getScheduler() in RibManager and Readvertise

Refs: #4528
Change-Id: Ie6dd2b0fbe5d57cd7878d86b0185ae5d9bd92cf0
diff --git a/daemon/mgmt/rib-manager.hpp b/daemon/mgmt/rib-manager.hpp
index 788a1d0..6888024 100644
--- a/daemon/mgmt/rib-manager.hpp
+++ b/daemon/mgmt/rib-manager.hpp
@@ -51,7 +51,7 @@
 {
 public:
   RibManager(rib::Rib& rib, ndn::Face& face, ndn::KeyChain& keyChain,
-             ndn::nfd::Controller& nfdController, Dispatcher& dispatcher, Scheduler& scheduler);
+             ndn::nfd::Controller& nfdController, Dispatcher& dispatcher);
 
   /**
    * @brief Apply localhost_security configuration.
@@ -245,7 +245,6 @@
   ndn::KeyChain& m_keyChain;
   ndn::nfd::Controller& m_nfdController;
   Dispatcher& m_dispatcher;
-  Scheduler& m_scheduler;
 
   ndn::nfd::FaceMonitor m_faceMonitor;
   ndn::ValidatorConfig m_localhostValidator;