Revert "Handle Davix dependency introduced by Root 6.19"
This reverts commit 40ab28ec
Fixed in ROOT 6.22 candidate and 6.20.06 - see https://sft.its.cern.ch/jira/browse/ROOT-10520
See clean-up campaign https://gitlab.cern.ch/lhcb-dpa/project/-/issues/39.
Edited by Marco Cattaneo