Fix "Unknown field: as_auto_editor" error when importing

Since last MB server update (http://blog.musicbrainz.org/2014/11/03/server-update-2014-11-03/), i get this error when importing:

The data you’ve seeded contained the following errors:

    Unknown field: as_auto_editor

This field was removed, replaced by 'make_votable' which is always unchecked by default.
So basically those lines aren't needed anymore.
Merge pull request #27 from zas/as_auto_editor_fix

Fix "Unknown field: as_auto_editor" error when importing