def stop():
Remove legacy instances of Lesson named after skills.
dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/internet/interfaces.py/IReactorCore.stop--crossover with--dataset/ETHPy150Open swcarpentry/amy/workshops/migrations/0012_auto_20150612_0807.py/remove_old_skill_names