net: cxgb3_main: remove redundant null pointer check before kfree_skb

kfree_skb has taken the null pointer into account. hence it is safe
to remove the redundant null pointer check before kfree_skb.
Signed-off-by: zhong jiang <zhongjiang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c

@@ -3422,7 +3422,6 @@ static void remove_one(struct pci_dev *pdev)
 				free_netdev(adapter->port[i]);
 
 		iounmap(adapter->regs);
-		if (adapter->nofail_skb)
 		kfree_skb(adapter->nofail_skb);
 		kfree(adapter);
 		pci_release_regions(pdev);