Remove unknown extensions test from test suite

[OR13]

This specification does not forbid "unknown extensions".
The word "unknown" does not even appear in the document.

Implementations of vc-jose-cose are also not forbidden from injecting additional claims before issuance that are not known to the W3C VCDM (and an appropriate @context, which would make them known to JSON-LD processors).

The test case that asserts that unknown extensions should yield an error is therefore invalid.

If this is invalid:

{
  "@context": [
    "https://www.w3.org/ns/credentials/v2",
    "https://www.w3.org/ns/credentials/examples/v2"
  ],
  "id": "http://university.example/credentials/1872",
  "type": [
    "VerifiableCredential",
    "ExampleAlumniCredential"
  ],
  "issuer": "https://example.issuer/vc-jose-cose",
  "validFrom": "2010-01-01T19:23:24Z",
  "credentialSchema": {
    "id": "https://example.org/examples/degree.json",
    "type": "JsonSchema"
  },
  "badExtension": {
    "huh": "what?"
  },
  "anotherBadOne": {
    "oh": "no!"
  },
  "credentialSubject": {
    "id": "did:example:123",
    "degree": {
      "type": "BachelorDegree",
      "name": "Bachelor of Science and Arts"
    }
  }
}

So is this:

{
  "phone_number_verified": true, // unknown extensions
  "email": "[email protected]",  // unknown extensions
  "@context": [
    "https://www.w3.org/ns/credentials/v2",
    "https://www.w3.org/ns/credentials/examples/v2", 
    { "@vocab": "https://www.iana.org/assignments/jwt/jwt.xhtml#" } // registry for "+jwt" extensions
  ],
  "id": "http://university.example/credentials/1872",
  "type": [
    "VerifiableCredential",
    "ExampleAlumniCredential"
  ],
  "issuer": "https://example.issuer/vc-jose-cose",
  "validFrom": "2010-01-01T19:23:24Z",
  "credentialSubject": {
    "id": "did:example:123",
    "degree": {
      "type": "BachelorDegree",
      "name": "Bachelor of Science and Arts"
    }
  }
}

[selfissued]

Yes, not understood claim MUST be ignored. Can you file an issue on this in https://github.com/w3c/vc-jose-cose-test-suite Orie? Thanks.

[brentzundel]

This seems to be an issue with the test suite rather than with the specification.
I am moving this issue there