Revert "SkShaper JSON output with cluster visualization"

This reverts commit 53610832a04157e4edf18347c3e69ddd9d799e3f.

Reason for revert: trying to fix flutter roll

Original change's description:
> SkShaper JSON output with cluster visualization
> 
> A simple JSON output for diagnostic purposes.
> If the run is not 1:1 code points to glyphs, then
> break the run into clusters.
> 
> Change-Id: I06980e0bac2cdca8a69b5b5ba0759a021fd4eb3b
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/209740
> Commit-Queue: Herb Derby <herb@google.com>
> Reviewed-by: Julia Lavrova <jlavrova@google.com>

TBR=herb@google.com,jlavrova@google.com

Change-Id: I19f8e40032378a856453d059fb5dcdb2f117b75c
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/211940
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
6 files changed