bron_kerbosch_all_cliques unused variable

[dancooke]

Using bron_kerbosch_all_cliques results in an unused variable warning

/usr/local/include/boost/graph/bron_kerbosch_all_cliques.hpp:227:41: error: unused variable 'j' [-Werror,-Wunused-variable]
        typename Container::iterator i, j;
                                        ^
/usr/local/include/boost/graph/bron_kerbosch_all_cliques.hpp:289:13: note: in instantiation of function template specialization 'boost::detail::extend_clique<boost::adjacency_matrix<boost::undirectedS, unsigned long, octopus::Phred<double, void>, boost::no_property, std::__1::allocator<bool> >, std::__1::deque<unsigned long, std::__1::allocator<unsigned long> >, std::__1::vector<unsigned long, std::__1::allocator<unsigned long> >, octopus::MaxCliqueVisitor<boost::adjacency_matrix<boost::undirectedS, unsigned long, octopus::Phred<double, void>, boost::no_property, std::__1::allocator<bool> > > >' requested here
    detail::extend_clique(g, clique, cands, nots, vis, min);
            ^
/usr/local/include/boost/graph/bron_kerbosch_all_cliques.hpp:297:3: note: in instantiation of function template specialization 'boost::bron_kerbosch_all_cliques<boost::adjacency_matrix<boost::undirectedS, unsigned long, octopus::Phred<double, void>, boost::no_property, std::__1::allocator<bool> >, octopus::MaxCliqueVisitor<boost::adjacency_matrix<boost::undirectedS, unsigned long, octopus::Phred<double, void>, boost::no_property, std::__1::allocator<bool> > > >' requested here
{ bron_kerbosch_all_cliques(g, vis, 2); }

Looks like j can simply be removed?