If you drop the integrations manager config options from riot's config.json, Riot still leaves the icons there for you to click.

Ideally we would hide the 'integrations manager' and the 'sticker picker' buttons if there is no integrations manager configured.

These are the settings:

```
    "integrations_ui_url": "https://scalar.vector.im/",
    "integrations_rest_url": "https://scalar.vector.im/api",
```