Remove unneeded typedef from telemetry_server example

examples/telemetry_server/telemetry_server.cpp

@@ -32,7 +32,6 @@ class telemetry_server {
 public:
     typedef websocketpp::connection_hdl connection_hdl;
     typedef websocketpp::server<websocketpp::config::asio> server;
-    typedef websocketpp::lib::lock_guard<websocketpp::lib::mutex> scoped_lock;
 
     telemetry_server() : m_count(0) {
         // set up access channels to only log interesting things
@@ -201,4 +200,4 @@ int main(int argc, char* argv[]) {
 
     s.run(docroot, port);
     return 0;
-}
+}