LU-14828 tests: Remove extra debug

Accidentally committed 398m with extra debug.
This is sometimes causing OOMs in testing, and it's a
mistake anyway.

Fixes: cba07b68f9 ("LU-13798 llite: parallelize direct i/o issuance")
Test-Parameters: trivial
Signed-off-by: Patrick Farrell <pfarrell@whamcloud.com>
Change-Id: I734aa3a952d2c085b3fc0014af1bdc0e881000e6
Reviewed-on: https://review.whamcloud.com/44175
Reviewed-by: James Nunez <jnunez@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Alex Zhuravlev <bzzz@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>