you shouldn't be....as they have not asked for the documents....
moreover, i haven't attached any of my documents too.......

One of the point of Terms & Conditions on NTS website...
Candidates shall present original documents, along with a set of attested copies of all relevant documents, at the time of interview in case any of the documents found fake or bogus, candidature of the particular candidate will stand cancelled.

So, no need to worry........