LU-15110 quota: cosmetic changes in PQ

LU-15110 quota: cosmetic changes in PQ

cosmetic changes in PQ:
- make tgt_pool_free and qmt_sarr_pool_free void
- remove outdated comment from qmt_pool_lqes_lookup
- replace tabs with spaces

HPE-bug-id: LUS-9547
Change-Id: If4918b647eed1d971d00c521d010d0c72d349207
Signed-off-by: Sergey Cheremencev <sergey.cheremencev@hpe.com>
Reviewed-on: https://review.whamcloud.com/45258
Reviewed-by: Petros Koutoupis <petros.koutoupis@hpe.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Shaun Tancheff <shaun.tancheff@hpe.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>