Remove GrContext

Woo!

Change-Id: Ifa3ff7e79c7048c2f1d808cc9705593d72886f08
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/326436
Auto-Submit: Adlai Holler <adlai@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
29 files changed