This loader no longer exists.

It has been removed to the benefit of the loaders:
- swh.loader.core.loader.ContentLoader
- swh.loader.core.loader.TarballDirectoryLoader
- swh.loader.git.directory.GitCheckoutLoader
- swh.loader.mercurial.directory.HgCheckoutLoader
- swh.loader.svn.directory.SvnExportLoader

