Kill unused (debugging) sidebars.

Change-Id: I7d0af9d7c65e2d9d45b32870af495b2cd3eef749
Reviewed-on: https://gerrit.libreoffice.org/13084
Reviewed-by: Jan Holesovsky <kendy@collabora.com>
Tested-by: Jan Holesovsky <kendy@collabora.com>