code: def unregister(model_or_iterable, fail_silently=False):
      '''
      Remove one or more models from the autofixture registry.
      '''
      from django.db import models
      from .compat import get_model
  
      if issubclass(model_or_iterable, models.Model):
          model_or_iterable = [model_or_iterable]
      for model in model_or_iterable:
          if isinstance(model, string_types):
              model = get_model(*model.split('.', 1))
          try:
              del REGISTRY[model]
          except KeyError:
              if fail_silently:
                  continue
              raise ValueError(
                  u'The model %s.%s is not registered.' % (
                      model._meta.app_label,
                      model._meta.object_name,
                  )f unregister(model_or_iterable, fail_silently=False):
      '''
      Remove one or more models from the autofixture registry.
      '''
      from django.db import models
      from .compat import get_model
  
      if issubclass(model_or_iterable, models.Model):
          model_or_iterable = [model_or_iterable]
      for model in model_or_iterable:
          if isinstance(model, string_types):
              model = get_model(*model.split('.', 1))
          try:
              del REGISTRY[model]
          except KeyError:
              if fail_silently:
                  continue
              raise ValueError(
                  u'The model %s.%s is not registered.' % (
                      model._meta.app_label,
                      model._meta.object_name,
                  ))
docs: Remove one or more models from the autofixture registry.