rib: Cancel expiration on unregistration

refs: #1902

Change-Id: I85a75370ecc3677c8a9ebf3a48f3c0857598da2d
diff --git a/rib/rib-entry.hpp b/rib/rib-entry.hpp
index fc78624..b17085a 100644
--- a/rib/rib-entry.hpp
+++ b/rib/rib-entry.hpp
@@ -79,9 +79,8 @@
   insertFace(const FaceEntry& face);
 
   /** \brief erases a FaceEntry with the same faceId and origin
-   *  \return{ true if the face is removed, false otherwise }
    */
-  bool
+  void
   eraseFace(const FaceEntry& face);
 
   /** \brief erases a FaceEntry with the passed iterator