Remove a line from a draft order
Removes one line and returns the DRAFT with subtotal_minor and total_minor recomputed, so you do not have to re-read the quote to learn its new price. NEEDS ONLY write_draft_orders, unlike the draft delete above, and the asymmetry is deliberate. Removing a line is composing the document you are already authoring: nothing else references a line, and adding the variant back undoes it. Open drafts only; a completed draft is 409 draft_not_open.
Authorizations
A secret API key. Publishable keys cannot reach this API. A key may carry an expiry, and an expired key is refused exactly like an unknown one, with a 401 that names no reason; check the key's expires_at in the dashboard rather than inferring it from a response. When a merchant rolls a key's secret they choose a grace window of up to 3 days, and for its duration BOTH the new secret and the one it replaced authenticate, so an integration moves over on its own deploy schedule instead of at the instant the button is pressed. Move before the window closes: after it, the old secret is refused. Nothing else about this contract moves with a roll. The key keeps its id and its scopes, so the only thing an integration updates is the credential itself.
Headers
A unique key per logical write. Replaying a request with the same key returns the first response byte for byte instead of applying the write twice.
Response
Success
