441a762352
Since the null-safety test migration we've been generating both a .packages file and a package_config.json file. This deletes the use of the old .packages file and updates all references to use the new file. Change-Id: Iecef64ac8ed8579338795ad5327765118d643236 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/240650 Reviewed-by: Joshua Litt <joshualitt@google.com>