Removed dead code [skip hazardlib][demos]
Removed dead code [skip hazardlib][demos]


Former-commit-id: 09e02165488f6d87672da2f3069a4e97da648c51 [formerly c0bf2aa267e841273c252ecd4d6c3b57dd05c52a]
Former-commit-id: 1fdd9d816162eae6c674e63489f42d8d4d8c685a
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine