jurt: remove constructor in AnyConverter_Test (JUnit)

Change-Id: I4393b59d7d3a285160d6090847d9a16676f41f4d
Reviewed-on: https://gerrit.libreoffice.org/11677
Reviewed-by: David Ostrovsky <david@ostrovsky.org>
Tested-by: David Ostrovsky <david@ostrovsky.org>