[TASK] Avoid an invalid test prophecy

The class prophecy has not been imported and does
not seem to be needed for the test.

Resolves: #98379
Releases: main
Change-Id: I7f75854f3d8546076cc1d264c7b53431231623a8
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/75792


Tested-by: core-ci <typo3@b13.com>
Tested-by: Oliver Klee <typo3-coding@oliverklee.de>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>