Start deleting the product from its page (the menu next to "Go to catalog", "Delete"). The back office asks for a confirmation in a dialog; after it, the products list is shown.
Examples
When I delete the product from its page
When we delete the product from its page
And I delete the product from its page
Then I delete the product from its page
When delete the product from its page
Pattern
When(/^(I |we )*delete the product from its page$/, …)
Part of @webship-js/prestashop-steps (github.com/webship/prestashop-steps), a step pack for Webship-js 2.0.x.