def validate_field(self, errors, opts, f):
        pass
Deletes the delivery time with passed id.
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.4/django/db/backends/__init__.py/BaseDatabaseValidation.validate_field--crossover with--dataset/ETHPy150Open diefenbach/django-lfs/lfs/manage/views/delivery_times.py/delete_delivery_time