feat(core-flows, js-sdk, medusa): draft order shipping removal (#12124)

**What**
- allow removal of a shipping method

---

CLOSES CMRC-1013

packages/medusa/src/api/admin/draft-orders/[id]/edit/shipping-methods/method/[method_id]/route.ts

@@ -1,4 +1,7 @@
-import { updateDraftOrderShippingMethodWorkflow } from "@medusajs/core-flows"
+import {
+  removeDraftOrderShippingMethodWorkflow,
+  updateDraftOrderShippingMethodWorkflow,
+} from "@medusajs/core-flows"
 import {
   AuthenticatedMedusaRequest,
   MedusaResponse,
@@ -25,3 +28,23 @@ export const POST = async (
     draft_order_preview: result as unknown as HttpTypes.AdminDraftOrderPreview,
   })
 }
+
+export const DELETE = async (
+  req: AuthenticatedMedusaRequest,
+  res: MedusaResponse
+) => {
+  const { id, method_id } = req.params
+
+  const { result } = await removeDraftOrderShippingMethodWorkflow(
+    req.scope
+  ).run({
+    input: {
+      order_id: id,
+      shipping_method_id: method_id,
+    },
+  })
+
+  res.json({
+    draft_order_preview: result as unknown as HttpTypes.AdminDraftOrderPreview,
+  })
+}