engine: Removed.
engine: Removed.

Former-commit-id: 7c6229f077f8eb16f44acc3bdd55befdd4c82374 [formerly 3c19737a71adea5fc1c3cf01787f009bf85ea99d]
Former-commit-id: 6c988d0a424666e828a2c353e3661674591cd69a
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine