net: socionext: remove redundant pointer ndev

Pointer ndev is being assigned but is never used hence it is
redundant and can be removed.

Cleans up clang warning:
warning: variable 'ndev' set but not used [-Wunused-but-set-variable]
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/socionext/netsec.c

@@ -780,11 +780,9 @@ static int netsec_process_rx(struct netsec_priv *priv, int budget)
 static int netsec_napi_poll(struct napi_struct *napi, int budget)
 {
 	struct netsec_priv *priv;
-	struct net_device *ndev;
 	int tx, rx, done, todo;
 
 	priv = container_of(napi, struct netsec_priv, napi);
-	ndev = priv->ndev;
 
 	todo = budget;
 	do {