docs(pdf): remove stray duplicate 'from quoteSubtotal() in two ways:' line

Co-authored-by: Orca <help@stably.ai>

src/lib/pdf/format.ts

@@ -43,7 +43,6 @@ export function quoteSubtotal(items: { quantity: number; selling_price: number }
  * Sum of effective-qty × cost_price across PO items, where
  * `effective-qty` is `order_qty` when set (non-zero) and falls back to
  * `quantity` otherwise. Differs from `quoteSubtotal()` in two ways:
- * from `quoteSubtotal()` in two ways:
  *   1. Multiplies by `cost_price` (the supplier-facing price), not
  *      `selling_price` (the customer-facing price).
  *   2. Prefers `order_qty` when set, falls back to `quantity` so a