lightningd/connection: remove conn_fd field.

io_conn_fd(conn) will give it to you anyway.

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

lightningd/connection.c

@@ -69,7 +69,6 @@ void daemon_conn_init(tal_t *ctx, struct daemon_conn *dc, int fd,
 	dc->ctx = ctx;
 	dc->msg_in = NULL;
 	msg_queue_init(&dc->out, dc->ctx);
-	dc->conn_fd = fd;
 	dc->msg_queue_cleared_cb = NULL;
 	io_new_conn(ctx, fd, daemon_conn_start, dc);
 }

lightningd/connection.h

@@ -17,7 +17,7 @@ struct daemon_conn {
 	/* Queue of outgoing messages */
 	struct msg_queue out;
 
-	int conn_fd;
+	/* Underlying connection */
 	struct io_conn *conn;
 
 	/* Callback for incoming messages */