Remove custom footer template in favor of theme options (#51536)

Author: SrushtikShetty

doc/source/conf.py

@@ -261,7 +261,6 @@
         "json_url": "https://pandas.pydata.org/versions.json",
         "version_match": switcher_version,
     },
-
     # This shows a warning for patch releases since the
     # patch version doesn't compare as equal (e.g. 2.2.1 != 2.2.0 but it should be)
     "show_version_warning_banner": False,