FYI: You can only delete a scheduled Lock session once the session has ended.
Click on the Lock icon in the bottom right hand corner. 
Click on the Scheduled tab
Long press on the session you want to delete
Click Delete
FYI: You can only delete a scheduled Lock session once the session has ended.
Click on the Lock icon in the bottom right hand corner.
Click on the Scheduled tab
Long press on the session you want to delete
Click Delete