delete https://marketplace.walmartapis.com/v3/ca/items/
This API deactivates and unpublishes an item from the site.
Retired items are not displayed on Walmart.com, but their content remains in the system. You can republish an item by providing a future discontinue date.
Note: You can't reuse the SKU or Product ID from a retired item. If you need to change the SKU or Product ID, see the Product ID & SKU section.