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

[Debian testing autoremoval watch]

ruby-crb-blast 0.6.9-4 is marked for autoremoval from testing on 2021-12-05

It (build-)depends on packages with these RC bugs:
996138: ruby-bio: FTBFS with ruby3.0: ERROR: Test "ruby3.0" failed: Error: test_target(Bio::TestSiRNAPair): NoMethodError: undefined method `subseq' for "cuuucggugcggacguaaggagu":String
 https://bugs.debian.org/996138



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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