[Bug]: when transform esm to cjs, The require function still exists

### Version

v0.2.0

### Details

```js
// config
export default defineConfig({
  format: 'esm',
});
```

input:
``` js
// ./index.js
const utils = require('./utils');
```

output:
```js
var import_utils = require("./utils");
```

### Reproduce link

null

### Reproduce Steps

1. config `format=esm`
2. run build