Migrate to .ci.yaml (#82960)

dev/README.md

@@ -5,47 +5,3 @@ course, they may be interesting if you are curious.
 
 The tests in this directory are run in the `framework_tests_misc-*`
 shards.
-
-## Luci builder file
-`try_builders.json` and `prod_builders.json` contain the supported luci
-try/prod builders for flutter.
-### `try_builders.json`
-It follows format:
-```json
-{
-    "builders":[
-        {
-            "name":"yyy",
-            "repo":"flutter",
-            "task_name":"zzz",
-            "enabled":true,
-            "run_if":["a/b/", "c/d/**"]
-        }
-    ]
-}
-```
-* enabled(optional): `true` is the default value if unspecified
-* run_if(optional): will always be triggered if unspecified
-### `prod_builders.json`
-It follows format:
-```json
-{
-    "builders":[
-        {
-            "name":"yyy",
-            "repo":"flutter",
-            "task_name":"zzz",
-            "flaky":false
-        }
-    ]
-}
-```
-* name: (str), builder name
-* repo: (str), name of the repository that this task runs against
-* task_name: (str), task name that will appear in the flutter build dashboard
-* flaky: (bool), if true, failure of this task will not close the tree
-
-`try_builders.json` will be mainly used in
-[`flutter/cocoon`](https://github.com/flutter/cocoon) to trigger/update pre-submit
-flutter luci tasks, whereas `prod_builders.json` will be mainly used in `flutter/cocoon`
-to refresh luci task statuses to [dashboard](https://flutter-dashboard.appspot.com).