[!!!][TASK] Remove old typoscript constants editor defaults option

Remove support for the special constant comment
`###MOD_TS:EDITABLE_CONSTANTS###`. This constant was used to show
all constants before this comment as default constants in constants
editor and is dropped as ancient and widely unknown and rarely used
feature.

Releases: master
Resolves: #82425
Change-Id: I5345871818e1d627cacb8be6db2ab8629770237e
Reviewed-on: https://review.typo3.org/54086


Reviewed-by: Joerg Kummer <typo3@enobe.de>
Tested-by: Joerg Kummer <typo3@enobe.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Markus Hölzle <typo3@markus-hoelzle.de>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>