vcl: fdo#39468 - remove useless German comment

Change-Id: I8ba5a05fa310de32311afe6d49fe26045dc63e95
Reviewed-on: https://gerrit.libreoffice.org/12341
Reviewed-by: Chris Sherlock <chris.sherlock79@gmail.com>
Tested-by: Chris Sherlock <chris.sherlock79@gmail.com>