How do I get rid of work orders that were never worked on?

Set the status of such work orders to "Canceled". No parts will be reduced from stock for them and costs will be set to zero. For more information, see Create/Modify Work Orders

Example: Suppose there's a daily task to check the rollers. Some days this is skipped and on the following day, the new daily work order is completed. The uncompleted work orders appear on the screen until you change their status to "Canceled".