upgrade-calendar-date-delay (U2011)

A calendar view uses date_delay, removed in Odoo 20.0.

Applies to Odoo 20.0 and later.

What it does

Reports date_delay on <calendar> views.

Why is this bad?

Odoo 20.0 removed it: the view fails to validate. Use date_stop, if need be with a computed end date.