如何在flutter Data Table类中删除行的可点击特性？

import 'package:flutter/material.dart';

class MyDataTable extends StatefulWidget {
  @override
  _MyDataTableState createState() => _MyDataTableState();
}

class _MyDataTableState extends State<MyDataTable> {
  List<DataRow> rows = [
    DataRow(cells: [
      DataCell(Text('John')),
      DataCell(Text('Doe')),
      DataCell(Text('30')),
    ]),
    DataRow(cells: [
      DataCell(Text('Jane')),
      DataCell(Text('Smith')),
      DataCell(Text('25')),
    ]),
    DataRow(cells: [
      DataCell(Text('Bob')),
      DataCell(Text('Johnson')),
      DataCell(Text('35')),
    ]),
  ];

  void deleteRow(int index) {
    setState(() {
      rows.removeAt(index);
    });
  }

  @override
  Widget build(BuildContext context) {
    return ListView(
      children: [
        DataTable(
          onSelectAll: null,
          columns: [
            DataColumn(label: Text('First Name')),
            DataColumn(label: Text('Last Name')),
            DataColumn(label: Text('Age')),
          ],
          rows: List.generate(rows.length, (index) {
            return DataRow(
              selected: false,
              onSelectChanged: (selected) {
                deleteRow(index);
              },
              cells: rows[index].cells,
            );
          }),
        ),
      ],
    );
  }
}

void main() {
  runApp(MaterialApp(
    home: Scaffold(
      appBar: AppBar(title: Text('Data Table Example')),
      body: MyDataTable(),
    ),
  ));
}