[TASK] Remove has-call to caching framework in explodeSoftRefParserList

No need to call has on the caching framework in the function
explodeSoftRefParserList. Furthermore we do not need to store false
to the runtime cache if parseList is an empty string.

Resolves: #78773
Releases: master
Change-Id: Iaa3fae35d4d07a78eb0fde8efc892a9ddb46b974
Reviewed-on: https://review.typo3.org/50752


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Claus Due <claus@phpmind.net>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Reviewed-by: Robert van Kammen <rvkammen@hotmail.com>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Joerg Boesche <typo3@joergboesche.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Tested-by: Andreas Fernandez <typo3@scripting-base.de>