interanal/core/runtime: remove commented out fields
Change-Id: I887c6b6f458fa410c2f2ebbe8ede527c0296c5f0
Reviewed-on: https://cue-review.googlesource.com/c/cue/+/9763
Reviewed-by: CUE cueckoo <cueckoo@gmail.com>
Reviewed-by: Marcel van Lohuizen <mpvl@golang.org>