[TASK] Remove extension_loaded('hash') check

PHP extension 'hash' is a PHP core built in since 7.4
and can't be disabled. Clean up the core a bit.

Resolves: #99438
Releases: main
Change-Id: If5b33146bbe191a06c5f7c8b5884483fbe87985a
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/77272


Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Christoph Lehmann <christoph.lehmann@networkteam.com>