Remove an unneeded import
Remove an unneeded import


Former-commit-id: cbba99c33a1a3b94bb83a5985c04c42c5ce4226e [formerly 2f0057c2b723dcbbbd86cd05143152c7c7888f29]
Former-commit-id: 593c1880ba27fc552e84b36d6c28db5ec57a0c56
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine