Records can be deleted in two ways. 

1. Open a record and click on the actions button in the top left side of the record. Select Delete from the dropdown menu.

Click the Yes, delete button in the pop-up.

2. Select one or more records from the list by clicking the box to the right of the record. Click the trashcan icon in the top right. Type "Delete these items" and click the Delete These Items button to permanently delete.