Revert "Better Matrix/Scalar testing"

This reverts commit abb611550eb8e8b82949895395a5a6c3e06ae7ab.

Reason for revert: Build break
Original change's description:
> Better Matrix/Scalar testing
>
> Adding tests for matrix math and comparison
> bug: skia:12681
>
> Change-Id: Ia1537ee2e411383749456fd6ff938b7c9a2e1061
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/493416
> Reviewed-by: John Stiles <johnstiles@google.com>
> Commit-Queue: Julia Lavrova <jlavrova@google.com>

Change-Id: I70871b4b75c1f10e870dc5e884a42405a80fc0f9
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/494816
Reviewed-by: John Stiles <johnstiles@google.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Julia Lavrova <jlavrova@google.com>
8 files changed