[DRE-maint] ruby-arbre is marked for autoremoval from testing

[Debian testing autoremoval watch]

ruby-arbre 1.2.1-4 is marked for autoremoval from testing on 2021-11-09

It is affected by these RC bugs:
996125: ruby-arbre: FTBFS with ruby3.0: ERROR: Test "ruby3.0" failed: RuntimeError:
 https://bugs.debian.org/996125

It (build-)depends on packages with these RC bugs:
996207: ruby-combustion: FTBFS with ruby3.0: ERROR: Test "ruby3.0" failed: Failure/Error: require "bundler/setup"
 https://bugs.debian.org/996207



This mail is generated by:
https://salsa.debian.org/release-team/release-tools/-/blob/master/mailer/mail_autoremovals.pl

Autoremoval data is generated by:
https://salsa.debian.org/qa/udd/-/blob/master/udd/testing_autoremovals_gatherer.pl