Removed unused import
Removed unused import


Former-commit-id: aa2edda126846d7323e427eec024e1f6cd314520 [formerly ce1d3c1f0d0a2f66e22d49fea6aa83571a9c3a2c]
Former-commit-id: bf1e698c5a203a6c6a678bdb1632e52257cbab71
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine