Delete a page from the page tree: "Delete" in the options of its row, then "Yes, I'm sure" on the confirmation page. Its sub pages are deleted with it.
Examples
When I delete the page "News" in the page tree
When we delete the page "Old news" in the page tree
And I delete the page "Events" from the page tree
When delete the page "Press" in the CMS page tree
And we delete the page "Board" from the page tree
Pattern
When(/^(I |we )*delete the page "([^"]*)" (?:in|from) the (?:(?:django )?CMS )?page tree$/, …)
Part of @webship-js/django-cms-steps (github.com/webship/django-cms-steps), a step pack for Webship-js 2.0.x.