vcl: cleanup headers - remove comments, tabify

Change-Id: I718832960abe07450bc9fdda15297cb5e56f84e4
Reviewed-on: https://gerrit.libreoffice.org/11674
Reviewed-by: Chris Sherlock <chris.sherlock79@gmail.com>
Tested-by: Chris Sherlock <chris.sherlock79@gmail.com>