Remove old experimental SkiaRenderer APIs

Change-Id: I21bd0155bf28420c10caf43af29748def510643c
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/203171
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
4 files changed