Removed some unused modules
Removed some unused modules


Former-commit-id: 5e9fdbf5082b72c2aefe953386ea80676e58394c [formerly 5e9fdbf5082b72c2aefe953386ea80676e58394c [formerly 15d934e357e0f4c6f4a512958da77ab5a1776e4b]]
Former-commit-id: 5ccba9a5bb373a847b5df92693a62a4be23f0854
Former-commit-id: 2711178ddfff09744eb0df10893b6b77e87038cd
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine