Function remove 

pub async fn remove(
    pool: &PgPool,
    actor: &Actor,
    line_id: Uuid,
) -> AppResult<BomLine>

Removes a BOM line from an in-work revision.

Invariants

• Permission: the line’s parent revision is visible (“not found” otherwise), checked out by the actor (409 otherwise) and editable (revisions::ensure_editable: in work, CAD editor of its group).
• Locks: the parent revision row (revisions::lock).
• Audit: bom.remove.
• Notifications / webhooks: none.
• Atomic: one transaction.