An HTTP/1.1 204 No Content response is returned after curl -i -X DELETE. What occurred?

An HTTP 204 No Content status code indicates that the server successfully processed the request, but is not returning any content. For a DELETE request, this specifically means the resource was successfully deleted. The server doesn't need to send back a representation of the deleted resource or any other data, hence "No Content." If the object existed but couldn't be deleted, a 4xx or 5xx error (e.g., 403 Forbidden, 500 Internal Server Error) would be returned. If the object was not found, a 404 Not Found would be returned. An invalid URI would typically result in a 400 Bad Request or 404 Not Found, depending on how the server interprets the invalidity.