Revert "Add SkGlyphRunList"

This reverts commit f2e4a039df33d9246bd0ec68602d4d06e6199553.

Reason for revert: Breaks asan tests

Original change's description:
> Add SkGlyphRunList
> 
> Extend the glyph run system with a glyph run list. This
> allows the processing of text blobs.
> 
> Add original text an cluster to runs for PDF.
> 
> Change-Id: If4867d000e45f8975a30e982fc8fdbe104ef4332
> Reviewed-on: https://skia-review.googlesource.com/135627
> Reviewed-by: Ben Wagner <bungeman@google.com>
> Commit-Queue: Herb Derby <herb@google.com>

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

Change-Id: I903592714da901383efc7e5f47ce3dfd529e2aca
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/136761
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Herb Derby <herb@google.com>
3 files changed