input/logictree.py: removed debug code. test coverage is now 98%
input/logictree.py: removed debug code. test coverage is now 98%


Former-commit-id: eedf6533e00b577f31b69e6ee54e1cfdc9817fc9
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine