warning fix: comment out an unused class member

Fix the warning mentioned here: !1559 (comment 37706)

added WarnFix label

requested review from @f.kornas

assigned to @se.gorbunov

mentioned in merge request !1559 (merged)

approved this merge request

enabled an automatic merge when the pipeline for f43b8e30 succeeds

Dear @i.selyuzhenkov,

you have been identified as code owner of at least one file which was changed with this merge request.

Please check the changes and approve them or request changes.

added CodeOwners label

merged