remove nonce derive credential options

Author: mkhraisha

components/DeriveCredentialOptions.yml

@@ -17,16 +17,12 @@ components:
       additionalProperties: false
       description: Options for specifying how the derived credential is created.
       properties:
-        nonce:
-          type: string
-          description: An encoded nonce provided by the holder of the credential, to be included in the DataIntegrityProof.
         selectivePointers: 
           type: array
           description: An array of JSON pointers specifying the selectively disclosed information.
           items:
             type: string
       example:
         {
-          "nonce": "lEixQKDQvRecCifKl789TQj+Ii6YWDLSwn3AxR0VpPJ1QV5htod/0VCchVf1zVM0y2E=",
           "selectivePointers": ["/credentialSubject/birthCountry"]
         }