nrd<->rib: removing rib entries on face removal

refs #1327

Change-Id: I5abc10b3ab14fbf9b3bc6af64e896753c2cf5946
diff --git a/src/rib.hpp b/src/rib.hpp
index f3a713a..3196817 100644
--- a/src/rib.hpp
+++ b/src/rib.hpp
@@ -33,6 +33,9 @@
   void
   erase(const PrefixRegOptions& options);
 
+  void
+  erase(uint64_t faceId);
+
   const_iterator
   begin() const;