Revert of Experiment with using one goroutine in capture_skps to see if it improves output (patchset #1 id:1 of https://codereview.chromium.org/2036713002/ )
Revert of Experiment with using one goroutine in capture_skps to see if it improves output (patchset #1 id:1 of https://codereview.chromium.org/2036713002/ )

Reason for revert:
Did not seem to help much

Original issue's description:
> Experiment with using one goroutine in capture_skps to see if it improves output
>
> BUG=skia:5294
> TBR=benjaminwagner
>
> Committed: https://skia.googlesource.com/buildbot/+/81bb1135e77cbe43dc03de21f80f8ee1487576e5

TBR=
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:5294

Review-Url: https://codereview.chromium.org/2034843002

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot