nbd/common: nbd_tls_handshake: remove extra TRACE

Error is propagated to the caller, TRACE is not needed.
Signed-off-by: NVladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Message-Id: <20170707152918.23086-6-vsementsov@virtuozzo.com>
Signed-off-by: NEric Blake <eblake@redhat.com>

nbd/common.c

@@ -97,9 +97,7 @@ void nbd_tls_handshake(QIOTask *task,
 {
     struct NBDTLSHandshakeData *data = opaque;
 
-    if (qio_task_propagate_error(task, &data->error)) {
-        TRACE("TLS failed %s", error_get_pretty(data->error));
-    }
+    qio_task_propagate_error(task, &data->error);
     data->complete = true;
     g_main_loop_quit(data->loop);
 }