[TASK] Remove unused `submitFile_grlist() from Indexer

Resolves: #102701
Releases: main
Change-Id: I0546bdc6ebdce3a405fd6421ddc0656e6d577cf4
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/82259


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