Method remove_edge

src/svgfill/src/graph_2d.h:414–418

    }

    void remove_edge(const Point_2& u, const Point_2& v) {
        adjacency_list[u].erase(v);
        adjacency_list[v].erase(u);
        assert_symmetric();
    }

    void insert(const Point_2& u, const Point_2& v) {
        adjacency_list[u].insert(v);