fix(medusa): Remove shipping on updates to cart.items (#4715)

* rm shipping on line item updates

* Add tests

* remove verbose flag

* Create real-items-rhyme.md

packages/medusa/src/api/routes/store/carts/update-line-item.ts

@@ -73,9 +73,9 @@ export default async (req, res) => {
     if (validated.quantity === 0) {
       await cartService.withTransaction(m).removeLineItem(id, line_id)
     } else {
-      const cart = await cartService
-        .withTransaction(m)
-        .retrieve(id, { relations: ["items", "items.variant"] })
+      const cart = await cartService.withTransaction(m).retrieve(id, {
+        relations: ["items", "items.variant", "shipping_methods"],
+      })
 
       const existing = cart.items.find((i) => i.id === line_id)
       if (!existing) {