for (Edge e0: graph.getSelf().getEdges()) {
    if(e0.getWeight() > 3) {
        Node n1 = e0.getNeighbor(graph.getSelf()); 
        for (Node n2: n1.getNeighbors()) {
            if (!n2.equals(graph.getSelf())) {
                graph.removeEdge(
                    graph.findEdge(graph.getSelf(), n2)
                );
            }
        }
    }
}