[CLEANUP] Remove unnecessary fully qualified names

Remove unnecessary fully qualified names from Utility classes.

Resolves: #62505
Releases: master
Change-Id: I3d4af98670911b3b49bd8043136c92422925cd2a
Reviewed-on: http://review.typo3.org/33588
Reviewed-by: Stefan Froemken <froemken@gmail.com>
Tested-by: Stefan Froemken <froemken@gmail.com>
Reviewed-by: Markus Klein <klein.t3@reelworx.at>
Tested-by: Markus Klein <klein.t3@reelworx.at>