[TASK] Remove unused code related to config.locale_all

In TYPO3 v10 locale is set very early in due to the availability of the Site Language,
making the whole set up working properly without having to evaluate
config.locale_all TypoScript.

This code can now safely be removed.

Resolves: #82491
Releases: master
Change-Id: I9df3ec2d2e111e0ec035971fe42efcc280ac6afd
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/64045


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Josef Glatz <josefglatz@gmail.com>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Josef Glatz <josefglatz@gmail.com>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>