Infra: Only remove contents node from PEP ToCs (#4784)

Author: hugovk

pep_sphinx_extensions/pep_processor/html/pep_html_builder.py

@@ -33,7 +33,8 @@ def get_doc_context(self, docname: str, body: str, _metatags: str) -> dict:
         toc_tree = self.env.tocs[docname].deepcopy()
         if len(toc_tree) and len(toc_tree[0]) > 1:
             toc_tree = toc_tree[0][1]  # don't include document title
-            del toc_tree[0]  # remove contents node
+            if docname.startswith("pep-"):
+                del toc_tree[0]  # remove contents node from PEPs
             for node in toc_tree.findall(nodes.reference):
                 node["refuri"] = node["anchorname"] or '#'  # fix targets
             toc = self.render_partial(toc_tree)["fragment"]