Remove unused test files

[waynehoover]

After the contracts these tests reference are deleted we can delete these tests too:

RabbitHoleReceipt.spec.ts
RabbitHoleTickets.spec.ts
ReceiptRenderer.spec.ts

[waynehoover]

This is done, RabbitHoleTickets.spec.ts is still needed because we are still using this contract, we need to convert the tests there to fonudry.