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

Refs: #4528
Change-Id: Ie6dd2b0fbe5d57cd7878d86b0185ae5d9bd92cf0
diff --git a/daemon/rib/readvertise/readvertise.hpp b/daemon/rib/readvertise/readvertise.hpp
index a14d438..871702f 100644
--- a/daemon/rib/readvertise/readvertise.hpp
+++ b/daemon/rib/readvertise/readvertise.hpp
@@ -43,9 +43,8 @@
  */
 class Readvertise : noncopyable
 {
-
 public:
-  Readvertise(Rib& rib, Scheduler& scheduler,
+  Readvertise(Rib& rib,
               unique_ptr<ReadvertisePolicy> policy,
               unique_ptr<ReadvertiseDestination> destination);
 
@@ -76,7 +75,6 @@
   static const time::milliseconds RETRY_DELAY_MIN;
   static const time::milliseconds RETRY_DELAY_MAX;
 
-  Scheduler& m_scheduler;
   unique_ptr<ReadvertisePolicy> m_policy;
   unique_ptr<ReadvertiseDestination> m_destination;