code: def remove_selected_classification(self):
          
          removed_classes = self.hazard_class_form.selectedItems()
          current_item = self.hazard_class_form.currentItem()
          removed_index = self.hazard_class_form.indexFromItem(current_item)
          del self.classification[removed_index.row()]
          for item in removed_classes:
              self.hazard_class_form.takeItem(
                  self.hazard_class_form.row(item))
docs: Remove selected item on hazard class form.