def unregister_serializer(format):
    if not _serializers:
        _load_serializers()
    if format not in _serializers:
        raise SerializerDoesNotExist(format)
    del _serializers[format]
Unregister a given serializer. This is not a thread-safe operation.
dataset/ETHPy150Open django/django/django/core/serializers/__init__.py/unregister_serializer