Remove 'Page 1' from the new service page

Because:
- It's not that helpful to say 'page 1' without 'of 38'
- The next page is also titled 'Page 1'

Fixes [card #7944](https://www.agileplannerapp.com/boards/187120/cards/7944)
Merge pull request #150 from alphagov/remove-page-1-supertitle

Remove 'Page 1' from the new service page