code: def pytest_unconfigure(config):
      MARK_GEN._config = getattr(config, "_old_mark_config", None)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from .legacy import matchkeyword
  from .legacy import matchmark
  from .structures import EMPTY_PARAMETERSET_OPTION
  from .structures import get_empty_parameterset_mark
  from .structures import Mark
  from .structures import MARK_GEN
  from .structures import MarkDecorator
  from .structures import MarkGenerator
  from .structures import ParameterSet
  from _pytest.config import UsageError
label_desc: Use image node_id 8 for calling a global function with example usage: pytest_unconfigure(config) without return types