NARVAL_F_RemovIndex removes the value stored at the index i of a vector v.
Examples
v=[12345];//vectori=2;//index[vv]=NARVAL_F_RemovIndex(v,i);//application of NARVAL_F_RemovIndexvv[vvv]=NARVAL_F_RemovIndex(vv,i);//application of NARVAL_F_RemovIndexvvv