landlock: Fix cosmetic change

This line removal should not be there and it makes it more difficult to
backport the following patch.

Cc: Günther Noack <gnoack@google.com>
Cc: Konstantin Meskhidze <konstantin.meskhidze@huawei.com>
Fixes: 7a11275c ("landlock: Refactor layer helpers")
Link: https://lore.kernel.org/r/20250719104204.545188-2-mic@digikod.net


Signed-off-by: Mickaël Salaün <mic@digikod.net>