hamradio: Delete unnecessary checks before the macro call “dev_kfree_skb”

The dev_kfree_skb() function performs also input parameter validation.
Thus the test around the shown calls is not needed.

This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/hamradio/baycom_epp.c

@@ -961,7 +961,6 @@ static int epp_close(struct net_device *dev)
 	parport_write_control(pp, 0); /* reset the adapter */
         parport_release(bc->pdev);
         parport_unregister_device(bc->pdev);
-	if (bc->skb)
 	dev_kfree_skb(bc->skb);
 	bc->skb = NULL;
 	printk(KERN_INFO "%s: close epp at iobase 0x%lx irq %u\n",

drivers/net/hamradio/hdlcdrv.c

@@ -475,7 +475,6 @@ static int hdlcdrv_close(struct net_device *dev)
 
 	if (s->ops && s->ops->close)
 		i = s->ops->close(dev);
-	if (s->skb)
 	dev_kfree_skb(s->skb);
 	s->skb = NULL;
 	s->opened = 0;