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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 project_delete_notif(self, tenant_id, tenant_name):
 """Tenant Delete notification. """

        if not self.fw_init:
            return
        rtr_name = '_'.join([fw_constants.TENANT_EDGE_RTR, tenant_name])
        self.os_helper.delete_router_by_name(rtr_name, tenant_id)