Remove unreachable code in config.py
Remove unreachable code in config.py

The code already checked if the level was in the cur_item so
there's no exception that's going to be raised.

Change-Id: I383c4adc5838712535f22bf441de2008e77270ec

chair6/bandit,pombredanne/bandit,stackforge/bandit,stackforge/bandit,pombredanne/bandit