Disable julia build temporarily
Disable julia build temporarily

Follow-up to https://github.com/berkeley-dsep-infra/datahub/pull/1966,
which seems to have not worked.

ryanlovett/datahub,ryanlovett/datahub,berkeley-dsep-infra/datahub,berkeley-dsep-infra/datahub,berkeley-dsep-infra/datahub,ryanlovett/datahub