Revert old changes to test file
Revert old changes to test file

Upon finishing our work we still had a few failing tests. They were failing due to this file being out of step with the [file that generates the schemas it uses](https://github.com/alphagov/govuk-content-schemas/blob/ae16865a109d115bf96661b47b832c3978a10fb6/examples/travel_advice_index/frontend/index.json). We believe that the use of jQ covered up the fact that this test should never have worked, note the code we've removed and the lack of Argentina from the linked repo.

Co-authored-by: Graham Lewis <1962cafca023439d49812617b1a591521de8dc58@digital.cabinet-office.gov.uk>

alphagov/frontend,alphagov/frontend,alphagov/frontend,alphagov/frontend