Infra: Fix 404s (#3760)

Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>

Author: AA-Turner

pep_sphinx_extensions/__init__.py

@@ -20,10 +20,6 @@
     from sphinx.application import Sphinx
 
 
-def _depart_maths():
-    pass  # No-op callable for the type checker
-
-
 def _update_config_for_builder(app: Sphinx) -> None:
     app.env.document_ids = {}  # For PEPReferenceRoleTitleText
     app.env.settings["builder"] = app.builder.name
@@ -84,8 +80,8 @@ def setup(app: Sphinx) -> dict[str, bool]:
     app.connect("env-before-read-docs", create_pep_zero)  # PEP 0 hook
 
     # Mathematics rendering
-    inline_maths = HTMLTranslator.visit_math, _depart_maths
-    block_maths = HTMLTranslator.visit_math_block, _depart_maths
+    inline_maths = HTMLTranslator.visit_math, None
+    block_maths = HTMLTranslator.visit_math_block, None
     app.add_html_math_renderer("maths_to_html", inline_maths, block_maths)  # Render maths to HTML
 
     # Parallel safety: https://www.sphinx-doc.org/en/master/extdev/index.html#extension-metadata

requirements.txt

@@ -2,7 +2,7 @@
 Pygments >= 2.9.0
 # Sphinx 6.1.0 broke copying images in parallel builds; fixed in 6.1.2
 # See https://github.com/sphinx-doc/sphinx/pull/11100
-Sphinx >= 5.1.1, != 6.1.0, != 6.1.1, < 7.3
+Sphinx >= 5.1.1, != 6.1.0, != 6.1.1
 docutils >= 0.19.0
 
 sphinx-autobuild