Update sidekiq configuration

Refs: #2872

config/initializers/sidekiq.rb

@@ -8,19 +8,4 @@
     pool = ENV.fetch("SIDEKIQ_DB_POOL_SIZE") { 25 }
     ActiveRecord::Base.establish_connection "#{database_url}?pool=#{pool}"
   end
-
-  config.default_retries_exhausted = -> (msg, ex) do
-    job_id = msg.dig('args', 0, 'job_id')
-
-    unless job_id
-      Sidekiq.logger.warn "Unable to get job_id in default_retries_exhausted for #{msg}: #{ex}"
-      return
-    end
-
-    if db_job = Job.find_by(job_id: job_id)
-      db_job.update_column(:status, "dead")
-      Sidekiq.logger.warn "Job id=#{db_job.id} job_id=#{job_id} for " +
-                          "#{db_job.owner_type} id=#{db_job.owner_id} is dead"
-    end
-  end
 end