distgit/pagure: remove the commit ACL for API keys in stg
    
    This was removed in prod in d0a8837 but left around in stg for
    testing purposes. However, it is suspected that this was causing
    users to not be able to push to forks in distgit, so removing.
    
    https://pagure.io/fedora-infrastructure/issue/10045
    
    Signed-off-by: Ryan Lerch <rlerch@redhat.com>