namei: remove LOOKUP_NO_XDEV check from handle_mounts

This is preparation to RESOLVE_NO_XDEV fix in following commits.
No functional change intended.

The only place that ever looks at
ND_JUMPED in nd->state is complete_walk()
and we are not going to reach
it if handle_mounts() returns an error

Signed-off-by: Askar Safin <safinaskar@zohomail.com>
Link: https://lore.kernel.org/20250825181233.2464822-3-safinaskar@zohomail.com


Signed-off-by: Christian Brauner <brauner@kernel.org>