code: def validate_config_values(app: Sphinx, config: Config) -> None:
      for key in list(config.latex_elements):
          if key not in DEFAULT_SETTINGS:
              msg = __(
                  "Unknown configure key: latex_elements[%r], ignored."
              )
              logger.warning(msg % (key,))
              config.latex_elements.pop(key)
  
imports: from __future__ import annotations
  import os
  import warnings
  from os import path
  from typing import TYPE_CHECKING, Any
  from docutils.frontend import OptionParser
  import sphinx.builders.latex.nodes
  from sphinx import addnodes, highlighting, package_dir
  from sphinx.builders import Builder
  from sphinx.builders.latex.constants import ADDITIONAL_SETTINGS, DEFAULT_SETTINGS, SHORTHANDOFF
  from sphinx.builders.latex.theming import Theme, ThemeFactory
  from sphinx.builders.latex.util import ExtBabel
  from sphinx.config import ENUM, Config
  from sphinx.environment.adapters.asset import ImageAdapter
  from sphinx.errors import NoUri, SphinxError
  from sphinx.locale import _, __
  from sphinx.util import logging, texescape
  from sphinx.util.console import bold, darkgreen
  from sphinx.util.display import progress_message, status_iterator
  from sphinx.util.docutils import SphinxFileOutput, new_document
  from sphinx.util.fileutil import copy_asset_file
  from sphinx.util.i18n import format_date
  from sphinx.util.nodes import inline_all_toctrees
  from sphinx.util.osutil import SEP, make_filename_from_project
  from sphinx.util.template import LaTeXRenderer
  from sphinx.writers.latex import LaTeXTranslator, LaTeXWriter
  from docutils import nodes
label_desc: Use image node_id 1 for calling a global function with example usage: validate_config_values(app, config) without return types