Added some missing documentation, unused function cleanup
Added some missing documentation, unused function cleanup


Former-commit-id: 209f2e677b0f266b3c4ba19e0eb9dfc23568628b [formerly f88b457242c87f775d4490ef0f30fbdbc612ebe1] [formerly f88b457242c87f775d4490ef0f30fbdbc612ebe1 [formerly 2fff32918031551a7bb27458e572410649db944d]]
Former-commit-id: 96994337a914e4c6a984fce7bf96cbe022791ce5
Former-commit-id: ede5df48b10523bb4e0fa54dad6723e51a55bc19
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine