[NET]: Kill eth_copy_and_sum().

It hasn't "summed" anything in over 7 years, and it's
just a straight mempcy ala skb_copy_to_linear_data()
so just get rid of it.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/usb/catc.c b/drivers/net/usb/catc.c
index 86e90c5..76752d84 100644
--- a/drivers/net/usb/catc.c
+++ b/drivers/net/usb/catc.c
@@ -255,7 +255,7 @@
 		if (!(skb = dev_alloc_skb(pkt_len)))
 			return;
 
-		eth_copy_and_sum(skb, pkt_start + pkt_offset, pkt_len, 0);
+		skb_copy_to_linear_data(skb, pkt_start + pkt_offset, pkt_len);
 		skb_put(skb, pkt_len);
 
 		skb->protocol = eth_type_trans(skb, catc->netdev);