This feature is only accessible from Choco Web. Here is how you can delete a product from the catalog:
Open your Choco Webtool on your browser and navigate to the Catalog tab
Click on Delete Products at the top right, to select the products you want to permanently delete.
Once done, click on Delete at the bottom right and confirm the action.
⚠️ If your catalog is integrated, make sure the product is also removed from your ERP to prevent it from reappearing in the next sync.