iucv: remove some pointless conditionals before kfree_skb()

Remove some pointless conditionals before kfree_skb().

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/iucv/af_iucv.c b/net/iucv/af_iucv.c
index eb8a2a0..49e7865 100644
--- a/net/iucv/af_iucv.c
+++ b/net/iucv/af_iucv.c
@@ -1171,8 +1171,7 @@
 
 		spin_unlock_irqrestore(&list->lock, flags);
 
-		if (this)
-			kfree_skb(this);
+		kfree_skb(this);
 	}
 	BUG_ON(!this);