[TASK] Remove "no RDCT"-workaround in fe_users Forgot-Password mail

As the used method sendNotifyEmail doesnt substitute URLs
with \TYPO3\CMS\Core\Utility\GeneralUtility::substUrlsInPlainText
the former workaround for security reasons is not needed.

Resolves: #62782
Releases: master
Change-Id: Ie7d57cd3e1925c6442982c87b53f3a5ee8feb6e0
Reviewed-on: http://review.typo3.org/23658
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Benjamin Mack <benni@typo3.org>
Tested-by: Benjamin Mack <benni@typo3.org>