LU-15728 mdd: fix sanity-56oc failure

LU-15728 mdd: fix sanity-56oc failure

sanity 56oc starts failing since relatime patch was landed.
'relatime' patch introduced an atime behavior change.  It was forcing
atime uptime to disk on MDD if ondisk atime is older than ondisk
mtime/ctime to match relatime (even if relatime was not enabled).

This was an optimization, trying to have a slightly better atime value
cheaply. This is unfortunately causing regression in sanity-56oc.
Let's remove it for now until we understand that better.

Fixes: c10c6ee ("LU-15728 llite: fix relatime support")
Test-Parameters: testlist=sanity env=ONLY=56oc,ONLY_REPEAT=70
Change-Id: Ieed4d4c7523c26cfc5bc230986d96b2acf152dee
Signed-off-by: Aurelien Degremont <degremoa@amazon.com>
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/50009
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Alex Zhuravlev <bzzz@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>