Drop the source upgrade change

We no longer need to point people away from using db:migrate

doc/update/upgrading_from_source.md

@@ -324,7 +324,7 @@ sudo -u git -H bundle install --deployment --without development test mysql aws
 sudo -u git -H bundle clean
 
 # Run database migrations
-sudo -u git -H bundle exec rake gitlab:db:configure RAILS_ENV=production
+sudo -u git -H bundle exec rake db:migrate RAILS_ENV=production
 
 # Compile GetText PO files
 

lib/tasks/migrate/schema_check.rake

+# frozen_string_literal: true
+
 desc 'Configures the database by running migrate, or by loading the schema and seeding if needed'
 task schema_version_check: :environment do
   next if ENV['SKIP_SCHEMA_VERSION_CHECK']

spec/tasks/gitlab/uploads/check_rake_spec.rb

+# frozen_string_literal: true
+
 require 'rake_helper'
 
 describe 'gitlab:uploads rake tasks' do