If we're verifying/accumulating/throwing all possible classifier errors anyway,
we don't need our own classifier.

Change-Id: Ibfbdc4e5151190385598fc50bda9f9921b6aedce
Reviewed-on: https://chromium-review.googlesource.com/c/1348080
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57751}