If you've run out of an item and need to remove it from your menu, there are two ways to do this:
From the Owner Dashboard
From the Owner Tablet
From the Owner Dashboard:
Steps:
Go to the Dashboard > Restaurant > Menu > Items
Find the item and turn the Available switch off
From the Owner Tablet:
Steps:
Go to Menu on the left, and select 1 or more items
Click the Edit button at the top, and you will see 3 options:
Mark items as available
Mark items as unavailable
Mark items as unavailable for X days
Pick an option and then click on Apply.