[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/hamachi.c b/drivers/net/hamachi.c
index 2521b11..15254dc 100644
--- a/drivers/net/hamachi.c
+++ b/drivers/net/hamachi.c
@@ -1575,8 +1575,8 @@
 							    PCI_DMA_FROMDEVICE);
 				/* Call copy + cksum if available. */
 #if 1 || USE_IP_COPYSUM
-				eth_copy_and_sum(skb,
-					hmp->rx_skbuff[entry]->data, pkt_len, 0);
+				skb_copy_to_linear_data(skb,
+					hmp->rx_skbuff[entry]->data, pkt_len);
 				skb_put(skb, pkt_len);
 #else
 				memcpy(skb_put(skb, pkt_len), hmp->rx_ring_dma