085529d58d
This flag was being kept around in case the corresponding feature (https://github.com/dart-lang/language/issues/1274) wound up having bugs and needed to be switched off. It's now had sufficient bake time that we no longer need the flag. Removing the flag allows us to remove a bunch of flow analysis code that's no longer needed. Bug: https://github.com/dart-lang/language/issues/1274 Change-Id: Ib91fa09a560bb0ebc6bff280ffc37d6037816ef9 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/187981 Reviewed-by: Konstantin Shcheglov <scheglov@google.com> Commit-Queue: Paul Berry <paulberry@google.com>