fix: remove rdf-js stub

[jeswr]

As discussed in hypermedia-app/hydra-validator#122 this stub should not be in-use anywhere

[bourgeoa]

Thanks. can you rebase to fix/remove-rdfjs-stub
Tests do fail.

• you must add @rdfjs/types as dev-dependency
• and edit
  

  rdflib.js/tests/types/rdfjs-compatibility.ts

  Line 4 in 6ab4f04

  import * as RdfJs from 'rdf-js';

[jeswr]

Thanks for the review @bourgeoa - all comments should now be addressed