gro: unexport tcp4_gro_receive and tcp4_gro_complete

tcp4_gro_receive() and tcp4_gro_complete() dont need to be exported.
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv4/tcp_ipv4.c

@@ -2571,7 +2571,6 @@ struct sk_buff **tcp4_gro_receive(struct sk_buff **head, struct sk_buff *skb)
 
 	return tcp_gro_receive(head, skb);
 }
-EXPORT_SYMBOL(tcp4_gro_receive);
 
 int tcp4_gro_complete(struct sk_buff *skb)
 {
@@ -2584,7 +2583,6 @@ int tcp4_gro_complete(struct sk_buff *skb)
 
 	return tcp_gro_complete(skb);
 }
-EXPORT_SYMBOL(tcp4_gro_complete);
 
 struct proto tcp_prot = {
 	.name			= "TCP",