silence compiler warning

modules/gfx/src/gfx_object.cc

@@ -679,10 +679,14 @@ void GfxObj::SmoothVertices(float smoothf)
 
 namespace {
 
+/*
+commented out to silence compiler warning, as it is not needed anywhere
 float normalize(float v, float min_v, float max_v)
 {
   return (v-min_v)/(max_v-min_v);
 }
+*/
+
 }
 
 void GfxObj::render_labels() const