Finish removing deprecated SkCanvas virtuals (#17445)

API staging is complete - these defines have been removed.
https://dart.googlesource.com/external/github.com/flutter/engine/+/c9506cb8e93e5e8879152ff5c948b175abb5b997
1 file changed
tree: e26e0576df217b2ad699a43501c90ab8b8f5f65a
  1. commits.json