When updating openapi_operations.yaml, I discovered that four billing-related endpoints have suddenly disappeared from both the OpenAPI metadata and the official GitHub v3 API documentation website:
GET /orgs/{org}/settings/billing/packages
GET /orgs/{org}/settings/billing/shared-storage
GET /users/{username}/settings/billing/packages
GET /users/{username}/settings/billing/shared-storage
Without live testing on an org with billing, it will not be clear whether these endpoint still actually exist or not.
As a stop-gap measure, I will keep the endpoints around but remove them from the automated openapi tools.