Cleanup some code concerning the extension list reload.

Resolves: #71071
Releases: master
Change-Id: I0fdd1e918a23b41e08583541aea504ead8f67319
Reviewed-on: https://review.typo3.org/44345


Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Nicole Cordes <typo3@cordes.co>
Tested-by: Nicole Cordes <typo3@cordes.co>