To delete several reports at once:
Select the check box to the left of each report definition you want to run or delete.
Select the operation (Delete) in the Bulk Actions drop-down list.
Click Apply.
Bulk actions apply to the current page only. If you select several items on one page, then navigate to the next page to select some additional items, a subsequent attempt to perform a bulk delete only applies to the second set of items you selected. The previous selections are retained and still appear checked if you navigate back to the first page. However, the bulk action is not performed on these items.