pylint: remove useless suppression
    
    The newer version of pylint has fixed false positives and
    does not need anymore these suppressions:
    - global-variable-not-assigned
    - invalid-sequence-index
    - no-name-in-module
    - not-callable
    - unsupported-assignment-operation
    
    Related: https://pagure.io/freeipa/issue/9278
    Signed-off-by: Florence Blanc-Renaud <flo@redhat.com>
    Reviewed-By: Stanislav Levin <slev@altlinux.org>