Remove empty method
Remove empty method

We should either have all the default implementations (methods that return empty strings)
or we should have none. For now, none.

jtigger/exercism.io,mhelmetag/exercism.io,nathanbwright/exercism.io,mhelmetag/exercism.io,jtigger/exercism.io,treiff/exercism.io,RaptorRCX/exercism.io,treiff/exercism.io,nathanbwright/exercism.io,jtigger/exercism.io,nathanbwright/exercism.io,jtigger/exercism.io,mhelmetag/exercism.io,tejasbubane/exercism.io,RaptorRCX/exercism.io,tejasbubane/exercism.io,RaptorRCX/exercism.io,nathanbwright/exercism.io,RaptorRCX/exercism.io,tejasbubane/exercism.io,treiff/exercism.io,treiff/exercism.io,mhelmetag/exercism.io,tejasbubane/exercism.io