The AbstractRequestHandler was an abstract class
which didn't add any helper method at all, concrete
implementations did benefit from.

In fact, it even implemented a contract method, which
should notbe done by an abstract class but only by
specific implementations.

Besides that, only DI methods had been shared which
also just hides the dependencies of the specific
implementations.

Releases: master
Resolves: #93157
Change-Id: Ib054f9435e7fa3937e5250bfce62b210c1cbb4e9
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/67219


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Benjamin Franzke <bfr@qbus.de>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Benjamin Franzke <bfr@qbus.de>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>