Remove ASCII art and useless comments from sw module

Change-Id: I3ba4ac78fd4810e006b1034bbe7c28b1803895d2
Reviewed-on: https://gerrit.libreoffice.org/9494
Reviewed-by: Noel Grandin <noelgrandin@gmail.com>
Tested-by: Noel Grandin <noelgrandin@gmail.com>