janitor - fix some unused vars
janitor - fix some unused vars

ellson/graphviz,ellson/graphviz,jho1965us/graphviz,jho1965us/graphviz,jho1965us/graphviz,ellson/graphviz,ellson/graphviz,jho1965us/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,jho1965us/graphviz,ellson/graphviz,jho1965us/graphviz,jho1965us/graphviz,jho1965us/graphviz,jho1965us/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,jho1965us/graphviz,jho1965us/graphviz