[RM] Do not support ruby 3.1

[Lucas Kanashiro]

ruby-sprite-factory and ruby-yaml-db do not support ruby 3.1 and they were already removed from Debian testing:

https://tracker.debian.org/news/1383394/ruby-sprite-factory-removed-from-testing/
https://tracker.debian.org/news/1383331/ruby-yaml-db-removed-from-testing/

Both do not have reverse dependencies:

$ reverse-depends -b -r lunar src:ruby-yaml-db
No reverse dependencies found
$ reverse-depends -r lunar src:ruby-yaml-db
No reverse dependencies found

$ reverse-depends -b -r lunar src:ruby-sprite-factory
No reverse dependencies found
$ reverse-depends -r lunar src:ruby-sprite-factory
No reverse dependencies found

[Christian Ehrhardt  (paelzer)]

Indeed, status in lunar and Debian is as reported.
Following Debian with the removal to unblock the full transition to 3.1

Removing packages from lunar:
 ruby-yaml-db 0.7.0-1 in lunar
  ruby-yaml-db 0.7.0-1 in lunar amd64
  ruby-yaml-db 0.7.0-1 in lunar arm64
  ruby-yaml-db 0.7.0-1 in lunar armhf
  ruby-yaml-db 0.7.0-1 in lunar i386
  ruby-yaml-db 0.7.0-1 in lunar ppc64el
  ruby-yaml-db 0.7.0-1 in lunar riscv64
  ruby-yaml-db 0.7.0-1 in lunar s390x
 ruby-sprite-factory 1.7.1-4 in lunar
  ruby-sprite-factory 1.7.1-4 in lunar amd64
  ruby-sprite-factory 1.7.1-4 in lunar arm64
  ruby-sprite-factory 1.7.1-4 in lunar armhf
  ruby-sprite-factory 1.7.1-4 in lunar i386
  ruby-sprite-factory 1.7.1-4 in lunar ppc64el
  ruby-sprite-factory 1.7.1-4 in lunar riscv64
  ruby-sprite-factory 1.7.1-4 in lunar s390x
Comment: not compatible with ruby 3.1 (LP: #2006470)
Remove [y|N]? y
2 packages successfully removed.