The file unused.easy contains a lot of symbols which are known
to be required, even they're currently not referenced by anyone.

Change-Id: I048c1656b240f7d601e4c99b8d9c4969b3954c87
Reviewed-on: https://gerrit.libreoffice.org/1084Reviewed-by: Andras Timar <atimar@suse.com>
Tested-by: Andras Timar <atimar@suse.com>