fix: ActiveJob::Handlers.unsubscribe #3270

Job	Run time
kafka / racecar / ubuntu-latest	11m 30s
mysql / mysql2 / ubuntu-latest	1m 30s
mysql / trilogy / ubuntu-latest	1m 19s
kafka / rdkafka / ubuntu-latest	15m 42s
kafka / ruby_kafka / ubuntu-latest	5m 54s
postgresql / pg / ubuntu-latest	3m 30s
postgresql / que / ubuntu-latest	2m 19s
rabbitmq / bunny / ubuntu-latest	1m 7s
redis / redis / ubuntu-latest	1m 6s
redis / resque / ubuntu-latest	1m 40s
other / dalli / ubuntu-latest	2m 42s
redis / sidekiq / ubuntu-latest	6m 12s
other / mongo / ubuntu-latest	2m 48s
	57m 19s

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