[TASK] Clarify description of [SYS][ipAnonymization]

The IP anonymization task uses its own configuration and doesn't allow a
fallback to the configuration defined in the settings. Therefore the
misleading text is removed.

Resolves: #97161
Releases: main, 12.4
Change-Id: If569c0ee75fd58ed2e069387776e9c15f7b41d18
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/84811


Tested-by: core-ci <typo3@b13.com>
Tested-by: Garvin Hicking <gh@faktor-e.de>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Garvin Hicking <gh@faktor-e.de>