nbd: drop unused nbd_receive_negotiate() aio_context argument

aio_context is always NULL, so drop it.

Suggested-by: Fabiano Rosas <farosas@suse.de>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20230830224802.493686-2-stefanha@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
diff --git a/nbd/client-connection.c b/nbd/client-connection.c
index 3d14296..aafb3d0 100644
--- a/nbd/client-connection.c
+++ b/nbd/client-connection.c
@@ -146,8 +146,7 @@
         return 0;
     }
 
-    ret = nbd_receive_negotiate(NULL, QIO_CHANNEL(sioc), tlscreds,
-                                tlshostname,
+    ret = nbd_receive_negotiate(QIO_CHANNEL(sioc), tlscreds, tlshostname,
                                 outioc, info, errp);
     if (ret < 0) {
         /*