RDMA/iwpm: Delete an error message for a failed memory allocation in iwpm_create_nlmsg()

Omit an extra message for a memory allocation failure in this function.

This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/core/iwpm_util.c

@@ -439,10 +439,9 @@ struct sk_buff *iwpm_create_nlmsg(u32 nl_op, struct nlmsghdr **nlh,
 	struct sk_buff *skb = NULL;
 
 	skb = dev_alloc_skb(IWPM_MSG_SIZE);
-	if (!skb) {
-		pr_err("%s Unable to allocate skb\n", __func__);
+	if (!skb)
 		goto create_nlmsg_exit;
-	}
+
 	if (!(ibnl_put_msg(skb, nlh, 0, 0, nl_client, nl_op,
 			   NLM_F_REQUEST))) {
 		pr_warn("%s: Unable to put the nlmsg header\n", __func__);