[TASK] Remove dead code in indexed search

The examples are outdated and should be removed in Core,
to avoid shipping dead code.

Resolves: #90833
Releases: master
Change-Id: Iff93c3963ec7efb91fa1c06c046494e8070f6a65
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63924


Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: Frank Nägler <frank.naegler@typo3.org>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Frank Nägler <frank.naegler@typo3.org>