shed some dead udp_port code

memcached.c

@@ -4769,8 +4769,6 @@ int main (int argc, char **argv) {
 
     /* create the listening socket, bind it, and init */
     if (settings.socketpath == NULL) {
-        int udp_port;
-
         const char *portnumber_filename = getenv("MEMCACHED_PORT_FILENAME");
         char temp_portnumber_filename[PATH_MAX];
         FILE *portnumber_file = NULL;
@@ -4800,7 +4798,6 @@ int main (int argc, char **argv) {
          * then daemonise if needed, then init libevent (in some cases
          * descriptors created by libevent wouldn't survive forking).
          */
-        udp_port = settings.udpport ? settings.udpport : settings.port;
 
         /* create the UDP listening socket and bind it */
         errno = 0;