[BUGFIX] Remove superfluous data attributes in ElementBrowser/LinkPicker

Various logic can be simplified within the ElementBrowser / LinkPicker
code base, where unused properties are handed around JS / PHP
without any usages anymore, due to previous refactorings.

Resolves: #94000
Releases: master
Change-Id: Ie673db2877adfb563a35e4efd79c2296740621d3
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/68894


Tested-by: core-ci <typo3@b13.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Oliver Bartsch <bo@cedev.de>