Remove unused bound variable in wedge class. Neither the class, nor its parents has a start property. I think it was supposed to be wedge-start but it isn't used in this function anyway.
@stevengj
Part of this is that the wedge class was never really documented. It was a hack for a particular project. (e.g. if I remember correctly, I never fully implemented its normal-vector computation.)
make_wedge
.start
property. I think it was supposed to bewedge-start
but it isn't used in this function anyway. @stevengj