It's not a runtime dependency (and even oslo.i18n has dropped it). The translation infrastructure installs Babel explicitly. See this mailing list thread for a full reasoning: http://lists.openstack.org/pipermail/openstack-discuss/2020-April/014227.html Keeping Babel in lower-constraints since other projects still pull it. Change-Id: Ib24d2941ac0f780f9092e48b17c343f8eb1d7151
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