LU-6142 llite: remove lti_iter field

LU-6142 llite: remove lti_iter field

This field is never used, so remove it.

Test-Parameters: trivial
Signed-off-by: Mr NeilBrown <neilb@suse.com>
Change-Id: I26489ce4200969b746b2214eaa5c07bdaddf2baf
Reviewed-on: https://review.whamcloud.com/35886
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Patrick Farrell <pfarrell@whamcloud.com>
Reviewed-by: Arshad Hussain <arshad.super@gmail.com>