On my system seeds are failing (as the task is not defined).
However if i comment the line out, seeds are still failing, because of some error inside the `comments`-seed:
```
010-users_and_teams.rb
020-logicgraph.rb
030-file_extensions.rb
040-git.rb
050-url_maps.rb
060-comments.rb

rake aborted!
undefined local variable or method `elements' for nil:NilClass
/Users/robustus/uni/ontospace/ontohub/.ontohub/gems/mail-2.5.4/lib/mail/parsers/rfc2822.rb:2864:in `comments'
/Users/robustus/uni/ontospace/ontohub/db/seeds/060-comments.rb:4:in `block in <top (required)>'
/Users/robustus/uni/ontospace/ontohub/db/seeds/060-comments.rb:2:in `times'
/Users/robustus/uni/ontospace/ontohub/db/seeds/060-comments.rb:2:in `<top (required)>'
```