This updates the generator of experimental flags to only refer to one
location for the current default language version.
Semantically the change does nothing, but it could make CLs that bump a
version smaller and easier to revert/patch.
Change-Id: I1c18c8e8105dfb33a302949ad2cfa159dae2addf
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/325660
Reviewed-by: Alexander Thomas <athom@google.com>
Reviewed-by: Paul Berry <paulberry@google.com>
Commit-Queue: Sigmund Cherem <sigmund@google.com>
Sigmund Cherem
38f62d2159