Nix more needless requires

app/jobs/active_storage/purge_job.rb

-require "active_job"
-
 class ActiveStorage::PurgeJob < ActiveJob::Base
   # FIXME: Limit this to a custom ActiveStorage error
   retry_on StandardError

test/models/attachments_test.rb

 require "test_helper"
 require "database/setup"
-require "active_storage/blob"
-
-require "active_job"
-ActiveJob::Base.queue_adapter = :test
-ActiveJob::Base.logger = nil
 
 # ActiveRecord::Base.logger = Logger.new(STDOUT)
 

test/models/blob_test.rb

 require "test_helper"
 require "database/setup"
-require "active_storage/blob"
 
 class ActiveStorage::BlobTest < ActiveSupport::TestCase
   test "create after upload sets byte size and checksum" do

test/test_helper.rb

@@ -8,6 +8,10 @@
 require "active_support/testing/autorun"
 require "byebug"
 
+require "active_job"
+ActiveJob::Base.queue_adapter = :test
+ActiveJob::Base.logger = nil
+
 require "active_storage"
 
 require "active_storage/service"