face: remove EndpointId from egress APIs

This commit partially reverts 075bb7dac4bf72cbfcff5e3c2da25c6476090787

refs: #4843, #4973

Change-Id: Iab92addff2bd0fa1e24100d43f9f7076ee84a3f8
diff --git a/daemon/face/link-service.hpp b/daemon/face/link-service.hpp
index c239cf2..c623622 100644
--- a/daemon/face/link-service.hpp
+++ b/daemon/face/link-service.hpp
@@ -113,23 +113,23 @@
   getEffectiveMtu() const;
 
 public: // upper interface to be used by forwarding
-  /** \brief Send Interest to \p endpoint
+  /** \brief Send Interest
    *  \pre setTransport has been called
    */
   void
-  sendInterest(const Interest& interest, const EndpointId& endpoint);
+  sendInterest(const Interest& interest);
 
-  /** \brief Send Data to \p endpoint
+  /** \brief Send Data
    *  \pre setTransport has been called
    */
   void
-  sendData(const Data& data, const EndpointId& endpoint);
+  sendData(const Data& data);
 
-  /** \brief Send Nack to \p endpoint
+  /** \brief Send Nack
    *  \pre setTransport has been called
    */
   void
-  sendNack(const ndn::lp::Nack& nack, const EndpointId& endpoint);
+  sendNack(const ndn::lp::Nack& nack);
 
   /** \brief signals on Interest received
    */
@@ -170,30 +170,30 @@
   receiveNack(const lp::Nack& nack, const EndpointId& endpoint);
 
 protected: // lower interface to be invoked in subclass (send path termination)
-  /** \brief send a lower-layer packet via Transport to \p endpoint
+  /** \brief send a lower-layer packet via Transport
    */
   void
-  sendPacket(const Block& packet, const EndpointId& endpoint);
+  sendPacket(const Block& packet);
 
 protected:
   void
   notifyDroppedInterest(const Interest& packet);
 
 private: // upper interface to be overridden in subclass (send path entrypoint)
-  /** \brief performs LinkService specific operations to send an Interest to \p endpoint
+  /** \brief performs LinkService specific operations to send an Interest
    */
   virtual void
-  doSendInterest(const Interest& interest, const EndpointId& endpoint) = 0;
+  doSendInterest(const Interest& interest) = 0;
 
-  /** \brief performs LinkService specific operations to send a Data to \p endpoint
+  /** \brief performs LinkService specific operations to send a Data
    */
   virtual void
-  doSendData(const Data& data, const EndpointId& endpoint) = 0;
+  doSendData(const Data& data) = 0;
 
-  /** \brief performs LinkService specific operations to send a Nack to \p endpoint
+  /** \brief performs LinkService specific operations to send a Nack
    */
   virtual void
-  doSendNack(const lp::Nack& nack, const EndpointId& endpoint) = 0;
+  doSendNack(const lp::Nack& nack) = 0;
 
 private: // lower interface to be overridden in subclass
   virtual void
@@ -241,9 +241,9 @@
 }
 
 inline void
-LinkService::sendPacket(const Block& packet, const EndpointId& endpoint)
+LinkService::sendPacket(const Block& packet)
 {
-  m_transport->send(packet, endpoint);
+  m_transport->send(packet);
 }
 
 std::ostream&