You should get rid of them to provide more metadata about this software.
Standards version of the package is outdated.
wishlist
The package should be updated to follow the last version of Debian Policy
(Standards-Version 4.5.1 instead of
4.5.0).
testing migrations
This package will soon be part of the auto-icu transition. You might want to ensure that your package is ready for it.
You can probably find supplementary information in the
debian-release
archives or in the corresponding
release.debian.org
bug.
![[bug history graph]](https://qa.debian.org/data/bts/graphs/o/openttd.png){kind=link}