Pylint: enable check for unused-variables
    
    Unused variables may:
    * make code less readable
    * create dead code
    * potentialy hide issues/errors
    
    Enabled check should prevent to leave unused variable in code
    
    Check is locally disabled for modules that fix is not clear or easy or have too many occurences of
    unused variables
    
    Reviewed-By: Florence Blanc-Renaud <frenaud@redhat.com>
    Reviewed-By: Stanislav Laznicka <slaznick@redhat.com>