Remove a webhook endpoint

Endpoint removed.

Malformed request — see detail. Any operation answers this to an unknown query parameter, and a POST without Idempotency-Key or a request body that is not JSON gets it too. A path the gateway in front of the API cannot parse, such as one containing %zz, is refused there before it reaches the API: 400 with an HTML body and none of these headers.

Missing, malformed, unknown, or wrong-mode API key — always this same opaque response. It carries no RateLimit-* headers: no partner was identified to count.

Resource not found — includes resources that exist but belong to another partner (never distinguished), and an id in the path that is over 100 characters or whose encoding the API cannot decode. A path with a malformed percent sign, such as %zz, is refused earlier by the gateway in front of the API: it gets 400 with an HTML body (see 400), not this response.

Per-partner quota exceeded for the current minute. Nothing was processed: wait Retry-After seconds and repeat the request — a POST with the same Idempotency-Key it carried. The gateway in front of the API also has a throttle shared by every partner; when it answers, the body is only {"message":"Too Many Requests"}, with none of these headers: back off exponentially, starting at about one second, and repeat with the same Idempotency-Key.