e9c7b2b905
This is a reland of commit 34de7578d2
Original change's description:
> [ddc] Clean up old async logic in ddc compiler.
>
> This removes any remaining code that was used for async functions.
>
> Change-Id: I3ffa391caf0befa13b67159c35b36daee6f810dc
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/372040
> Reviewed-by: Mark Zhou <markzipan@google.com>
> Reviewed-by: Nicholas Shahan <nshahan@google.com>
> Commit-Queue: Nate Biggs <natebiggs@google.com>
> Reviewed-by: Bob Nystrom <rnystrom@google.com>
Change-Id: I3d9d69809825265359074d5637325c227f2e0857
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/376001
Reviewed-by: Bob Nystrom <rnystrom@google.com>
Commit-Queue: Nate Biggs <natebiggs@google.com>
Reviewed-by: Mark Zhou <markzipan@google.com>