Revert "Merge branch 'pyfwdbwd' into 'master'"
This reverts merge request !22075 (merged)
Need to keep enum34
until AthSimulation is switched to LCG_95. cc @jchapman
This reverts merge request !22075 (merged)
Need to keep enum34
until AthSimulation is switched to LCG_95. cc @jchapman