Remove computation of angular error in demo
Remove computation of angular error in demo

StongeEtienne/dipy,villalonreina/dipy,nilgoyyou/dipy,matthieudumont/dipy,FrancoisRheaultUS/dipy,matthieudumont/dipy,FrancoisRheaultUS/dipy,nilgoyyou/dipy,villalonreina/dipy,StongeEtienne/dipy