This article will help you delete a SharePoint list. This article applies to SharePoint 2013.

1. First you will need to change the view to “All Items.”
2. Once the “All Items” view is present, sort the data in ascending order. This will place the oldest items at the top of the list.
3. Next, in the top left hand corner of the list, there is a check mark. Click this check mark to select all items on the page. There is no way to select a data range, select all, and delete. It must be done one page at a time!
4. In the Items menu at the top, select Delete Item and click OK. This may take several moments depending on how many items were selected.
5. Repeat steps 3 and 4 as desired.