DNS: Remove some unused, non-functional DNS functions

examples/webserver/webserver_main.c

@@ -142,10 +142,6 @@ int webserver_main(int argc, char *argv[])
   netlib_set_ipv4netmask("eth0", &addr);
 
 #ifdef CONFIG_EXAMPLES_WEBSERVER_DHCPC
-  /* Set up the resolver */
-
-  dns_bind();
-
   /* Get the MAC address of the NIC */
 
   netlib_getmacaddr("eth0", mac);