Menus in OrderCloud are unable to be deleted.
If you need to remove a Menu from being able to be ordered from or visible on your Customer Ordering Page, here are a few things you can do instead.
Remove the Menu from your Hours Tab
Login to OrderCloud
Select Manage Stores
Select the Location
Select the Menu to edit
Select the Hours tab
Unselect the Menu from the Days/Hours that no longer apply to your Menu by unchecking the box.
7. Scroll to the bottom of the Days section and select the Save button.
Remove the Menu from your Order Type
Login to OrderCloud
Select Manage Stores
Select the Location
Select the Menu to edit
Select the Menu Settings tab
6. Unselect the Order Type that the Menu is no longer associated with.