face: delete redundant protocol typedefs.

Change-Id: I32e1100e7395070a29ee813658aac82b63b6c4f2
diff --git a/daemon/face/tcp-face.hpp b/daemon/face/tcp-face.hpp
index 92ab627..b74380e 100644
--- a/daemon/face/tcp-face.hpp
+++ b/daemon/face/tcp-face.hpp
@@ -9,8 +9,7 @@
 
 #include "stream-face.hpp"
 
-namespace nfd
-{
+namespace nfd {
 
 /**
  * \brief Implementation of Face abstraction that uses TCP
@@ -19,8 +18,6 @@
 class TcpFace : public StreamFace<boost::asio::ip::tcp>
 {
 public:
-  typedef boost::asio::ip::tcp protocol;
-
   explicit
   TcpFace(const shared_ptr<protocol::socket>& socket, bool isOnDemand);
 };
@@ -35,8 +32,6 @@
 class TcpLocalFace : public StreamFace<boost::asio::ip::tcp, LocalFace>
 {
 public:
-  typedef boost::asio::ip::tcp protocol;
-
   explicit
   TcpLocalFace(const shared_ptr<protocol::socket>& socket, bool isOnDemand);
 };
@@ -62,7 +57,6 @@
   }
 };
 
-
 } // namespace nfd
 
 #endif // NFD_FACE_TCP_FACE_HPP