Revert "The very first version of a new SkText API."

This reverts commit 8a20cea604ebedb6d51472f08af425e253646674.

Reason for revert: Breaking some tests

Original change's description:
> The very first version of a new SkText API.
>
> SkText public API added.
> Interface.h updated.
>
> Change-Id: I82a87f33e6cf1394fa2520387f6895d33601376e
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/442003
> Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
> Commit-Queue: Julia Lavrova <jlavrova@google.com>

Change-Id: I879b198bc6fb44c46d11d967118f8d69eb74fee0
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/449296
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: Julia Lavrova <jlavrova@google.com>
25 files changed