Make a weekly action that checks that file against our lint list to look for deprecated or removed items and opens a GitHub Issue so it can be triaged and then the worked on.
We don't fully know when the JSON file gets updated (probably on Dart version releases) so we should be mostly up to date but maybe not ahead of stable releases.
We found the JSON file that has all the information we need, https://github.com/dart-lang/site-www/blob/17ccab9e54d0166753c088651a98a5b6e78c1078/src/_data/linter_rules.json#L1764
Make a weekly action that checks that file against our lint list to look for deprecated or removed items and opens a GitHub Issue so it can be triaged and then the worked on.
We don't fully know when the JSON file gets updated (probably on Dart version releases) so we should be mostly up to date but maybe not ahead of
stablereleases.