Remove unneeded configuration file (#130183)

Remove autosubmit config files that are no longer being used. This was from a previous design and not longer used.

*List which issues are fixed by this PR. You must list at least one issue.*
Part of flutter/flutter#130182

*If you had to change anything in the [flutter/tests] repo, include a link to the migration guide as per the [breaking change policy].*

Author: ricardoamador