Deleting a report is a batch job. If the delete operation fails, the report reappears in the list of reports and the View Batch Job page indicates that the job failed.
Before you begin
If the report job is scheduled to run at preset times, you must delete the scheduled report jobs and any output from the report job. For more information, see Delete a Scheduled Report Job and View An In Progress Report Job.
In the Security Console, click Reporting > Reports > Manage Existing.
Use the search fields to find the report that you want to delete.
Click the report that you want to delete, and click Delete.