how to use no prefix

Hi

I got this in my code:
```

@NgModule({
  declarations: [
   //...
  ],
  imports: [
    IonicModule.forRoot(MyApp),
    LocalStorageModule.withConfig({
      // prefix: 'MyApp',
      storageType: 'localStorage'
    })
  ],
```

but I still have a default prefix "ls".

Can you help me remove this ?

Thanks