Selecting a category does not select the grade items that reside in it. If you delete a category, the grade items associated with it become independent grade items.
You cannot delete grade items that are associated with another course object, such as a quiz, discussion topic, or assignment. To delete the item you must first remove the association. Click the Information icon for a grade item with an association to view details about where the item is used.
If you would like to proceed with removing Grade Items or Categories, follow the steps outlined below.