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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_actions(self, request):
 """Disable the "delete selected" admin action. Otherwise the action is present even though has_delete_permission is False, it just doesn't work. """

        actions = super(CertificateMixin, self).get_actions(request)
        actions.pop('delete_selected', '')
        return actions