Deleting Entities
You can delete an entity by calling the delete method on it.
var user = getInstance( "User" ).find( 1 );
user.delete();
The entity will still exist in any variables you have stored it in, even though it has been deleted from the database.
Just like updateAll, you can delete many records from the database by specifying a query with constraints and then calling the deleteAll method.
Deletes matching entities according to the configured query.
Additionally, you can pass in an array of ids to deleteAll to delete only those ids. Note that any previously configured constraints will still apply.