Remove invalid breadcrumbs aria role
Remove invalid breadcrumbs aria role

`role="breadcrumbs"` is not a thing.
https://www.w3.org/TR/wai-aria/roles#role_definitions

We previously removed from the component:
https://github.com/alphagov/static/pull/737

alphagov/contacts-frontend,alphagov/contacts-frontend,alphagov/contacts-frontend,alphagov/contacts-frontend