How to disable automatically-generated cross bins?

 Consider the following example code:(it's an example in SystemVerilog P1800-2009, Page 500)

int i,j;
covergroup ct;
coverpoint i { bins i[ = { [0:1] }; }
coverpoint j { bins j[ = { [0:1] }; }
x1: cross i,j;
x2: cross i,j {
bins i_zero = binsof(i) intersect { 0 };
}
endgroup

Cross x2 has the following bins:
i_zero // user-specified bin for
(i[1],j[0]) // an automatically-generated bin that is retained
(i[1],j[1]) // an automatically-generated bin that is retained

My question is: if I only want the first bin, i.e. i_zero, what should I do? I don't want automatically-generated cross bins, I just want user-defined bins, is there some method to disable "automatically-generated cross bins"?

Thanks a lot!