Removed unused import
Removed unused import


Former-commit-id: a5ee3ace181a79605a1b978c364c1b59a708c095 [formerly a0080c181050ffef70063ba4b52713594ba2920a]
Former-commit-id: 41197b5d1ea1cdb3bfc2d99df6438d49864c4f11
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine