examples/ethtool: remove unused parsing

[ upstream commit 5be3505 ]

The new_mtu was assigned twice, the first assignment could be removed.

Fixes: bda68ab ("examples/ethtool: add user-space ethtool sample application")

Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
Signed-off-by: Min Hu (Connor) <humin29@huawei.com>

examples/ethtool/ethtool-app/ethapp.c

@@ -528,7 +528,6 @@ pcmd_mtu_callback(void *ptr_params,
 		printf("Error: Invalid port number %i\n", params->port);
 		return;
 	}
-	new_mtu = atoi(params->opt);
 	new_mtu = strtoul(params->opt, &ptr_parse_end, 10);
 	if (*ptr_parse_end != '\0' ||
 			new_mtu < RTE_ETHER_MIN_MTU ||