[BUGFIX] Followup: Remove unused linkTo_UnCryptMailto JavaScript

The JavaScript for adding `linkTo_UnCryptMailto`
to the `window` got obsolete with the removal of
the f:uri.email ViewHelper and is therefore now
removed.

Resolves: #96202
Releases: main
Change-Id: I7c958c6ad80fb654efae52c50afa73fe1786df5f
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/72593


Tested-by: core-ci <typo3@b13.com>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Oliver Bartsch <bo@cedev.de>