fix(storage): preserve application logger

Remove the ActiveStorage migrator class-load logger override so eager loading does not replace the configured Rails logger or log level.

lib/active_storage/migrator.rb

@@ -1,11 +1,7 @@
 require 'yaml'
 require 'erb'
-require 'logger'
 
 class ActiveStorage::Migrator
-  Rails.logger = Logger.new($stdout)
-  Rails.logger.level = Logger::DEBUG
-
   def self.migrate(from_service_name, to_service_name, update_service_name: true)
     configs = load_storage_config
     # Check if services are configured correctly

spec/lib/active_storage/migrator_spec.rb

@@ -24,6 +24,14 @@ RSpec.describe ActiveStorage::Migrator do
 
         described_class.migrate('local', 'amazon', update_service_name: false)
       end
+
+      it 'does not override the application logger' do
+        allow(described_class).to receive(:migrate_blobs)
+
+        expect(Rails).not_to receive(:logger=)
+
+        described_class.migrate('local', 'amazon')
+      end
     end
 
     context 'when services are not configured correctly' do