There are two options available for deleting failures.
Using the row menu
Click on the Row Menu 
icon on the record row and click Delete to delete the record.
Click Yes on the confirmation message.
Using the Edit Inspection screen
If you want to check the inspection information before deleting it, you can click on the vertical ellipse icon on the record row, click on the Edit button and click the Delete button. Click Yes on the confirmation message, click No to quit without deleting.
