Iris 3.5 support
naive_multiset_solver is no longer needed due to upstream improvements in multiset_solver. I removed the call to it but didn't delete the code.
GitLab upgrade completed. Current version is 18.5.4
https://about.gitlab.com/releases/2025/09/18/gitlab-18-4-released/
https://about.gitlab.com/releases/2025/10/16/gitlab-18-5-released/
naive_multiset_solver is no longer needed due to upstream improvements in multiset_solver. I removed the call to it but didn't delete the code.