Function unregister

nodedb/src/event/alert/registry.rs:161–167

()

    #[test]
    fn unregister() {
        let reg = AlertRegistry::new();
        reg.register(make_alert(1, "a1"));
        assert!(reg.unregister(1, "a1"));
        assert!(!reg.unregister(1, "a1"));
        assert!(reg.get(1, "a1").is_none());
    }

    #[test]
    fn list_enabled() {