Remove redundant declaration of find_transport_name_by_bridge_addrport().

src/or/circuitbuild.h

@@ -137,8 +137,6 @@ const char *find_transport_name_by_bridge_addrport(const tor_addr_t *addr,
 struct transport_t;
 int find_transport_by_bridge_addrport(const tor_addr_t *addr, uint16_t port,
                                       const struct transport_t **transport);
-const char *find_transport_name_by_bridge_addrport(const tor_addr_t *addr,
-                                                   uint16_t port);
 
 int validate_pluggable_transports_config(void);