Remove www-origin-staging from nginx
Remove www-origin-staging from nginx

Gor doesn't send traffic to this hostname anymore so it's completely
unused. There's no need to keep it in our nginx config.

alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet