hv_netvsc: remove unused variable in netvsc_send()

With commit b56fc3c5 ("hv_netvsc: Fix a bug in netvsc_start_xmit()"),
skb variable is no longer used in netvsc_send. Remove variable and dead
code that depended on it.

Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: NJerry Snitselaar <jsnitsel@redhat.com>
Signed-off-by: NHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/hyperv/netvsc.c

@@ -826,7 +826,6 @@ int netvsc_send(struct hv_device *device,
 	u16 q_idx = packet->q_idx;
 	u32 pktlen = packet->total_data_buflen, msd_len = 0;
 	unsigned int section_index = NETVSC_INVALID_INDEX;
-	struct sk_buff *skb = NULL;
 	unsigned long flag;
 	struct multi_send_data *msdp;
 	struct hv_netvsc_packet *msd_send = NULL, *cur_send = NULL;
@@ -924,12 +923,8 @@ int netvsc_send(struct hv_device *device,
 	if (cur_send)
 		ret = netvsc_send_pkt(cur_send, net_device);
 
-	if (ret != 0) {
-		if (section_index != NETVSC_INVALID_INDEX)
-			netvsc_free_send_slot(net_device, section_index);
-	} else if (skb) {
-		dev_kfree_skb_any(skb);
-	}
+	if (ret != 0 && section_index != NETVSC_INVALID_INDEX)
+		netvsc_free_send_slot(net_device, section_index);
 
 	return ret;
 }