[DOCS] Drop superfluous extension scanner tag in RST of #90919

Feature RSTs should not provide a tag for the extension
scanner. However, a "NotScanned" tag was added to the RST file
of #90919. This is now removed.

Resolves: #97502
Related: #90919
Releases: main
Change-Id: I293c5322c8c6fc53da5c11713b3b7419fb10b449
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/74475


Tested-by: Björn Jacob <bjoern.jacob@tritum.de>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Oliver Klee <typo3-coding@oliverklee.de>
Tested-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Björn Jacob <bjoern.jacob@tritum.de>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Oliver Bartsch <bo@cedev.de>