tcp: remove some dead code

Now all skbs in write queue do not contain any payload in skb->head,
we can remove some dead code.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2023-06-09 20:42:45 +00:00 • committed by David S. Miller
commit b4a2439713