Revert "Use allowed_experiments.json when building SDK summary."

This reverts commit 97d94129964ec05475229b87d9514feefd20bbfc.

Reason for revert: This causes some, probably temporary, issues internally. Reverting for a day or two.

Original change's description:
> Use allowed_experiments.json when building SDK summary.
>
> Change-Id: I3fd73d9890d62cc7b3c19e061069979a6b65c9b7
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/149052
> Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
> Commit-Queue: Konstantin Shcheglov <scheglov@google.com>

TBR=scheglov@google.com,brianwilkerson@google.com

Change-Id: I9c8142bfc5728dd773830b653bb31d28b5e81628
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/149201
Reviewed-by: Konstantin Shcheglov <scheglov@google.com>
Commit-Queue: Konstantin Shcheglov <scheglov@google.com>

https://dart.googlesource.com/sdk/+/b6af46dc30793b120891221d0f7441d1cb9cb578
1 file changed
tree: ba268401ee59a6ea4c41af90123372fe0156ae99
  1. commits.json