[DRE-maint] rabbiter is marked for autoremoval from testing

[Debian testing autoremoval watch]

rabbiter 2.0.4-4 is marked for autoremoval from testing on 2021-11-25

It (build-)depends on packages with these RC bugs:
996316: ruby-mechanize: FTBFS with ruby3.0: ERROR: Test "ruby3.0" failed: /usr/lib/ruby/vendor_ruby/rubygems/dependency.rb:311:in `to_specs': Could not find 'webrick' (~> 1.6) among 107 total gem(s) (Gem::MissingSpecError)
 https://bugs.debian.org/996316
996341: ruby-ntlm: FTBFS with ruby3.0: ERROR: Test "ruby3.0" failed:      Failure/Error: dec.encrypt.update(plain) + dec.final
 https://bugs.debian.org/996341



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