implemented delete list item via CRUD

models/list_items_delete.go

@@ -0,0 +1,20 @@
+package models
+
+// Delete implements the delete method for listItem
+func (i *ListItem) Delete(id int64, doer *User) (err error) {
+
+	// Check if it exists
+	listitem, err := GetListItemByID(id)
+	if err != nil {
+		return
+	}
+
+	// Check if the user hat the right to delete that item
+	_, err = listItemPreCheck(i, doer, listitem.ListID)
+	if err != nil {
+		return
+	}
+
+	_, err = x.ID(id).Delete(ListItem{})
+	return
+}