removed cgi.hepvdist, it was not even computed

geometry.cpp

@@ -168,8 +168,7 @@ struct geometry_information {
   /** distance between hexagon vertex and hexagon center */
   ld hexvdist;
   
-  /** distance between heptagon vertex and hexagon center (either hcrossf or something else) */
-  ld hepvdist;
+  ld unused_value_1; /* removed */
 
   /** distance from heptagon center to heptagon vertex (either hexf or hcrossf) */
   ld rhexf;

goldberg.cpp

@@ -734,7 +734,6 @@ EX namespace gp {
       ld scale = 1 / hypot_d(2, next);
       if(!GOLDBERG) scale = 1;
       cgi.crossf *= scale;
-      cgi.hepvdist *= scale;
       cgi.hexhexdist *= scale;
       cgi.hexvdist *= scale;
       cgi.rhexf *= scale;

irregular.cpp

@@ -480,7 +480,6 @@ EX void compute_geometry() {
   if(IRREGULAR) {
     ld scale = sqrt(isize(cells_of_heptagon) * 1. / isize(cells));
     cgi.crossf *= scale;
-    cgi.hepvdist *= scale;
     cgi.rhexf *= scale;
     cgi.hexhexdist *= scale;
     cgi.hexvdist *= scale;