lightningd: remove unused allocation.

Not a leak, since it's off tmpctx, but send_htlc_out allocates this itself.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

lightningd/peer_htlcs.c

@@ -576,7 +576,6 @@ static void forward_htlc(struct htlc_in *hin,
 		goto fail;
 	}
 
-	hout = tal(tmpctx, struct htlc_out);
 	failcode = send_htlc_out(next, amt_to_forward,
 				 outgoing_cltv_value, &hin->payment_hash,
 				 0, next_onion, hin, &hout);