tls: rx: assume crypto always calls our callback

If crypto didn't always invoke our callback for async
we'd not be clearing skb->sk and would crash in the
skb core when freeing it. This if must be dead code.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/tls/tls_sw.c

@@ -268,9 +268,6 @@ static int tls_do_decryption(struct sock *sk,
 	if (ret == -EBADMSG)
 		TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSDECRYPTERROR);
 
-	if (async)
-		atomic_dec(&ctx->decrypt_pending);
-
 	return ret;
 }