code: function cleanup_manta(_cb) {
          self.manta.unlink(manta.path(p, true), function (m_err) {
              if (m_err) {
                  log.error(m_err, '_del_on_rename(%s): failed', p);
                  _cb(m_err);
              } else {
                  log.trace('_del_on_rename(%s): done', p);
                  _cb(null);
              }
          });
      }
docs: remove from manta