Remove support for address, contact info from PR API (align with pull…

… request 955) (#389)

1) Andre Lyver moved to former editor
2) Removed shipping, contact information to align with PR 955 on PR API
   w3c/payment-request#955

* minor fix to index.html
updated tidyconfig to align with PR API version

* remove tidy mark + fixup ws

* removed some whitespace

Co-authored-by: Marcos Cáceres <marcos@marcosc.com>