[CLEANUP] Cleanup code of TS module overview

The file handling has been removed some versions ago but some code
has not been removed.

Resolves: #61444
Releases: master
Change-Id: I369c15e999d087b7bf1ffb96529ab91d21b03a52
Reviewed-on: http://review.typo3.org/32644
Reviewed-by: Tymoteusz Motylewski <t.motylewski@gmail.com>
Tested-by: Tymoteusz Motylewski <t.motylewski@gmail.com>
Reviewed-by: Markus Klein <klein.t3@reelworx.at>
Tested-by: Markus Klein <klein.t3@reelworx.at>