tests/calcs/hazard/event_based/core_test:
tests/calcs/hazard/event_based/core_test:

Removed an assertion referencing the `n_sources` variable, which has been
deleted.


Former-commit-id: 05a5f2df0ee73581ce3cc28866117fc964108635 [formerly 05a5f2df0ee73581ce3cc28866117fc964108635 [formerly bc7e142d8273ca47650acc745c8bd24ad956c4c1]]
Former-commit-id: 8d4453c728ab502005d3054735e2991cd99280d9
Former-commit-id: c6a5cb533d4d733824d9d404e106594f17654cf9
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine