face: delete redundant protocol typedefs.

Change-Id: I32e1100e7395070a29ee813658aac82b63b6c4f2
diff --git a/daemon/face/udp-face.cpp b/daemon/face/udp-face.cpp
index 7de4d34..1cc0bc8 100644
--- a/daemon/face/udp-face.cpp
+++ b/daemon/face/udp-face.cpp
@@ -10,11 +10,8 @@
 
 NFD_LOG_INCLASS_TEMPLATE_SPECIALIZATION_DEFINE(DatagramFace, UdpFace::protocol, "UdpFace");
 
-UdpFace::UdpFace(const shared_ptr<UdpFace::protocol::socket>& socket,
-                 bool isOnDemand)
-  : DatagramFace<protocol>(FaceUri(socket->remote_endpoint()),
-                           socket,
-                           isOnDemand)
+UdpFace::UdpFace(const shared_ptr<UdpFace::protocol::socket>& socket, bool isOnDemand)
+  : DatagramFace<protocol>(FaceUri(socket->remote_endpoint()), socket, isOnDemand)
 {
 }
 
@@ -23,10 +20,11 @@
                             std::size_t nBytesReceived,
                             const boost::system::error_code& error)
 {
-  NFD_LOG_DEBUG("handleFirstReceive");
-  //checking if the received message size is too big.
-  //This check is redundant, since in the actual implementation a packet
-  //cannot be bigger than MAX_NDN_PACKET_SIZE
+  NFD_LOG_TRACE("handleFirstReceive");
+
+  // Checking if the received message size is too big.
+  // This check is redundant, since in the actual implementation
+  // a packet cannot be larger than MAX_NDN_PACKET_SIZE.
   if (!error && (nBytesReceived > MAX_NDN_PACKET_SIZE))
     {
       NFD_LOG_WARN("[id:" << this->getId()
@@ -35,8 +33,8 @@
                    << MAX_NDN_PACKET_SIZE );
       return;
     }
+
   receiveDatagram(buffer, nBytesReceived, error);
 }
 
-
 } // namespace nfd