face+fw: store and return PitToken from downstream

refs #4532

Change-Id: I97b95232a242186601459622f17983d1bef806d6
diff --git a/daemon/fw/strategy.hpp b/daemon/fw/strategy.hpp
index cc1b2b8..8c62329 100644
--- a/daemon/fw/strategy.hpp
+++ b/daemon/fw/strategy.hpp
@@ -241,10 +241,7 @@
    */
   VIRTUAL_WITH_TESTS void
   sendInterest(const shared_ptr<pit::Entry>& pitEntry,
-               const FaceEndpoint& egress, const Interest& interest)
-  {
-    m_forwarder.onOutgoingInterest(pitEntry, egress, interest);
-  }
+               const FaceEndpoint& egress, const Interest& interest);
 
   /** \brief send \p data to \p egress
    *  \param pitEntry PIT entry