Remove unused tests
    
    Two tests in test_intgration/test_authselect.py were marked as
    skipped in c5cdd5a5f0 due to removing of --no-sssd and --no-ac options.
    Tests are not needed any more.
    
    Fixes: https://pagure.io/freeipa/issue/7841
    Signed-off-by: Sergey Orlov <sorlov@redhat.com>
    Reviewed-By: Christian Heimes <cheimes@redhat.com>