You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: import_export_clean_up_service.rb
    path of file: ./repos/gitlabhq/app/services
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

class ImportExportCleanUpService
  LAST_MODIFIED_TIME_IN_MINUTES = 1440
  DIR_DEPTH = 5

  attr_reader :mmin, :path

  def initialize(mmin = LAST_MODIFIED_TIME_IN_MINUTES)
    @mmin = mmin
    @path = Gitlab::ImportExport.storage_path
  end

  def execute
    Gitlab::Metrics.measure(:import_export_clean_up) do
      execute_cleanup
    end
  end

  private

  def execute_cleanup
    clean_up_export_object_files
  ensure
    # We don't want a failure in cleaning up object storage from
    # blocking us from cleaning up temporary storage.
    clean_up_export_files if File.directory?(path)
  end

  def clean_up_export_files
    old_directories do |dir|
      FileUtils.remove_entry(dir)

      logger.info(
        message: 'Removed Import/Export tmp directory',
        dir_path: dir
      )
    end
  end

  def clean_up_exp
    
  def execute_cleanup
    clean_up_export_object_files
  ensure
    # We don't want a failure in cleaning up object storage from
    # blocking us from cleaning up temporary storage.
    clean_up_export_files if File.directory?(path)
  end

  def clean_up_export_files
    old_directories do |dir|
      FileUtils.remove_entry(dir)

      logger.info(
        message: 'Removed Import/Export tmp directory',
        dir_path: dir
      )
    end
  end

  def clean_up_export_object_files
    ImportExportUpload.with_export_file.updated_before(mmin.minutes.ago).each do |upload|
      upload.remove_export_file!
      upload.save!

      logger.info(
        message: 'Removed Import/Export export_file',
        project_id: upload.project_id,
        group_id: upload.group_id
      )
    end
  end

  def old_directories
    IO.popen(directories_cmd) do |find|
      find.each_line(chomp: true) do |directory|
        yield directory
      end
    end
  end

  def directories_cmd
    %W[find #{path} -mindepth #{DIR_DEPTH} -maxdepth #{DIR_DEPTH} -type d -not -path #{path} -mmin +#{mmin}]
  end

  def logger
    @logger ||= Gitlab::Import::Logger.build
  end
end