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

[Debian testing autoremoval watch]

ruby-sprite-factory 1.7.1-3 is marked for autoremoval from testing on 2021-11-21

It is affected by these RC bugs:
997364: ruby-sprite-factory: FTBFS: ERROR: Test "ruby2.7" failed: NoMethodError: undefined method `opacity=' for   320x64 DirectClass 16-bit:Magick::Image
 https://bugs.debian.org/997364



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https://salsa.debian.org/qa/udd/-/blob/master/udd/testing_autoremovals_gatherer.pl