Erroneous cleanup of remove archive path

[ncreuschling]

In copy.rake, L65 we erroneously delete remote_tmp_dir when we should only delete remote_archive_path (as stated in the info output).

      info I18n.t('file.remove', path: remote_archive_path, scope: :dkdeploy)
      execute :rm, '-rf', remote_tmp_dir

Fixing this issue improves parallel deployments.