um: mmu: remove stub_pages

I removed all the users of this some time ago, but
evidently forgot the pointers. Remove them from the
data structure too.

Fixes: bfc58e2b98 ("um: remove process stub VMA")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Johannes Berg 2023-09-25 21:29:48 +02:00 • committed by Richard Weinberger
commit 085bc003ba