The HOMEPAGE (http://homepages.inf.ed.ac.uk/s0239160/misc/lspbs/lspbs.html) for sys-cluster/lspbs is unavailable (404 or otherwise unreachable).
Adding treecleaners. I think this can go: - No rev deps - No other distro is packaging it (https://repology.org/project/lspbs/versions) - A modest effort on google didn't yield any new upstream or even a location for the dist tarball aside from our mirrors
Removing.