[CLEANUP] Use comments instead of PHPDoc style comments in copyright block

Resolves: #63753

Change-Id: I8116834d2ca9438b293200fe218264d2d58b8cdf
Reviewed-on: http://review.typo3.org/35260
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Tested-by: Oliver Klee <typo3-coding@oliverklee.de>