The multi-dimensional Sobol pattern required us to carefully use as low
dimensions as possible, as quality goes down in higher dimensions. Now that we
have two sampling patterns that are at least as good, there is no need to keep
it around and the implementation can be simplified.
TODO: I assumed here that Sobol-Burley can be used for adaptive sampling but
it's not clear that sample_is_even works.
Depends on D15746