Delete a single form by ID. Forms can be deleted in any state (draft, enabled, disabled).
Deleting a non-existent form succeeds (idempotent).

When the form owns an A/B test setup, the setup and its version forms are deleted as well.
A/B test version forms cannot be deleted directly; delete the parent form's A/B setup instead.

Scopes:
forms.write

Rate limit: 400 requests per minute.