remove write_canonical_dot prototype for function that does not exist

This function was removed in d3760b95bd696ab130c26dd36927ed498f7aae37 but its
prototype was not.

diff --git a/lib/common/render.h b/lib/common/render.h
index 80eda37569f6f4ce596c8eef83a48ae8533bbd43..39433d9f0222f4345ac5b1bd620f56440ae3b86a 100644 (file)
--- a/lib/common/render.h
+++ b/lib/common/render.h
@@ -151,7 +151,6 @@ extern "C" {
     extern void translate_bb(Agraph_t *, int);
     extern int wedgedEllipse (GVJ_t* job, pointf * pf, char* clrs);
     extern void update_bb_bz(boxf *bb, pointf *cp);
-    extern void write_canonical_dot(graph_t *g, FILE *f);
     extern boxf xdotBB (graph_t* g);
     extern char *findAttrColor(void *obj, attrsym_t *colorattr, char *dflt);