This reverts commit 1948b0a9fe.
Reason for revert: causes `promiseToFuture` to become undefined - b/295129286
Original change's description:
> [analyzer] simplify the libraries.dart file
>
> Change-Id: I86bc196eaddd9a80c02f38c8d947d3c0f4c63394
> CoreLibraryReviewExempt: the sdk_library_metadata/libraries.dart is only used by the analyzer
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/317803
> Reviewed-by: Konstantin Shcheglov <scheglov@google.com>
> Commit-Queue: Devon Carew <devoncarew@google.com>
Change-Id: I4810c408b996cefd46c0a40cc36818d34aa86071
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/319402
Auto-Submit: Oleh Prypin <oprypin@google.com>
Commit-Queue: Oleh Prypin <oprypin@google.com>
Reviewed-by: Alexander Thomas <athom@google.com>
Commit-Queue: Alexander Thomas <athom@google.com>
9f0f33c676