Retire old contents/drivers

[utkarshdalal]

We now have a manifest in the repo (manifest.json), and when we import a config or use the known config and the contents/driver doesn't exist in the app, it downloads from the manifest.

We can start retiring unused drivers + dxvk from the app and add them to the manifest, but must ensure that if a user has a config that tries to use them, it downloads and extracts correctly.

For example, we can:

1. Make a game run turnip 24.1.0 and dxvk-1.10.9-sarek
2. Export the config
3. Delete these two contents and reset the container
4. Add the contents to the manifest (you may need to load one locally for testing)
5. Import the config for the game - it should download turnip 24.1.0 and dxvk-1.10.9-sarek from the manifest