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


Former-commit-id: a2108a06e62f73483a6946570b9f6d0d31d73544 [formerly a2108a06e62f73483a6946570b9f6d0d31d73544 [formerly f1337f290c1c8b486f84dfc73bccaf052b0ef993]]
Former-commit-id: 014838553718e6940935e4f720b92400ee557912
Former-commit-id: 5b3682eaa942cd7c1727be9e0145f5ea024f1234
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine