Main.html became unused with recent refactorings,
along with a locallang key.

Resolves: #99664
Releases: main
Change-Id: Ied978096d4a7e5ea624137387526e2702abd60ad
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/77527


Reviewed-by: Jasmina Ließmann <minapokhalo+typo3@gmail.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Jasmina Ließmann <minapokhalo+typo3@gmail.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>