Removed unused import [skip CI]
Removed unused import [skip CI]


Former-commit-id: b765d4390057dc3b327b7080e5e10bfe900d8a4d [formerly 5173adcbc4938d7bc44dfe175c99aab970138874]
Former-commit-id: 08ae9051c4153875d9b10aa0731ddb5ce611dc6a
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine