java: remove comment noise

Change-Id: If6347197ff4436b4edd06e6e62d8e8e6fe1d4db6
Reviewed-on: https://gerrit.libreoffice.org/13408
Reviewed-by: Noel Grandin <noelgrandin@gmail.com>
Tested-by: Noel Grandin <noelgrandin@gmail.com>