protected function deleteFieldValue()
    {
        $this->controlAccess('field_value_delete');

        if ($this->field_value->delete($this->data_field_value['field_value_id'])) {
            $url = "admin/content/field/value/{$this->data_field['field_id']}";
            $this->redirect($url, $this->text('Field value has been deleted'), 'success');
        }

        $this->redirect('', $this->text('Field value has not been deleted'), 'warning');
    }