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


Former-commit-id: f76f8cbd5567a13f168a535c232a1bbab86adf25 [formerly 68686bc3f439a74b84bf8452b3f5c4aa99710dba]
Former-commit-id: 406e24b4a376484de91d19e45b7e77d60831aa9c
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine