Remove unused variable.
Remove unused variable.


Former-commit-id: dfb4cc1183e061d6b67d0369f0860e4d897fbd53 [formerly e776154236ba32a61b4d09a86f219fd9f3ccb7f0]
Former-commit-id: 0b37740955197f4dc882b791ef64eddd13c22bf6
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine