Remove old code which uses pwd pwd is not portable on Windows
Remove old code which uses pwd
pwd is not portable on Windows


Former-commit-id: e778f44e656bd29ed1f63cecaf4512ed71753e22 [formerly df303d4143fbedf98a9ce36087d143df30b8331b] [formerly df303d4143fbedf98a9ce36087d143df30b8331b [formerly 7078350372d00e514f16ddc5e5c04799da6877fc]]
Former-commit-id: 9856be6864ba460149134ed8439b540b46faee75
Former-commit-id: 6ed222aea50b3aebb667285a745ec04bf470552c
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine