[TASK] DatabaseRecordList: Drop property eCounter

The property has been dropped, as it doesn't do anything useful.
It is internal (see section), it could be dropped without further
notice.

Releases: master
Resolves: #92074
Change-Id: Iced7f072c180467c1ee0473477e1d10369cc17ec
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/65434


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>