doc: add missing doc string to items

items.go

@@ -41,6 +41,11 @@ func ListItems(opts ...RequestOption) Request {
 	}
 }
 
+// DeleteMoreItems deletes all the items that pass the filter.
+//
+// If an item becomes obsolete/no longer available, it is meaningful to keep it in the catalog
+// (along with all the interaction data, which are very useful) and only exclude the item from recommendations.
+// In such a case, use ReQL filter instead of deleting the item completely.
 func DeleteMoreItems() Request {
 	return Request{
 		Path:   "/more-items/",