JED - Disable and unregister the Nether and the End

{
    "dimensions":
    [
        {
            "dim": -1,
            "unregister": true,
            "disable_teleporting_to": true
        },
        {
            "dim": 1,
            "unregister": true,
            "disable_teleporting_to": true
        }
    ]
}