Before you delete a reporting group, you must first remove all student test assignments associated with the reporting group.
To delete a reporting group, follow these steps:
From Reports > Reporting Groups, search to find reporting group(s), or click the down arrow next to the Search button and select Show all results. Select the group(s) to add or remove student tests.
Open the task list and select Delete Reporting Groups. Click Start.
Select the check box next to the reporting group(s) that you want to delete. Click Delete.