[CLEANUP] Use comments not PHPDoc style comments in copyright block

This regular expression was used to replace PHPDoc style comments
with ordinary comments:

Search:
/\*\*(\n \* This file is part of the TYPO3 CMS project.)

Replace with:
/*$1

Resolves: #63328
Releases: master
Change-Id: Ic8f11dbfefee94a19657c8fe8426c81d1cb435d8
Reviewed-on: http://review.typo3.org/35103
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>