Delete experimental/sktext

This may be revived one day, but has been causing mild churn when
updating APIs.

Change-Id: I1bab7fdc0956e84bc0a6bdbfc2ebe58d7eff4f1e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/772898
Commit-Queue: Kevin Lubick <kjlubick@google.com>
Auto-Submit: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Julia Lavrova <jlavrova@google.com>
34 files changed