Removed the mention of altPageTitleProvider that were left on some
places after removing this deprecated provider.

Resolves: #88644
Releases: master
Change-Id: I0626373204706e7b57224ecd74b739d3b36d745b
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/61161


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Kevin Appelt <kevin.appelt@icloud.com>
Tested-by: Richard Haeser <richard@maxserv.com>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Simon Gilli <typo3@gilbertsoft.org>
Reviewed-by: Kevin Appelt <kevin.appelt@icloud.com>
Reviewed-by: Richard Haeser <richard@maxserv.com>