Revert "readthedocs 404 test"

This reverts commit 28f6ad1e3e93c3749bc3ae4127a372aeedb7b1e5.

docs/__404.rst

@@ -1,12 +0,0 @@
-:orphan:
-
-Page Not Found
-==============
-
-Sorry, We could not find a page.
-Try using the search box or go to the release homepage:
-
-  * `1.2.x (crux) <https://docs.vyos.io/en/crux/>`_
-  * `1.3.x (equuleus) <https://docs.vyos.io/en/equuleus/>`_
-  * `1.4.x (sagitta) <https://docs.vyos.io/en/sagitta/>`_
-  * `rolling release (circinus) <https://docs.vyos.io/en/latest/>`_

docs/conf.py

@@ -44,7 +44,7 @@ extensions = ['sphinx.ext.intersphinx',
               'sphinx.ext.todo',
               'sphinx.ext.ifconfig',
               'sphinx.ext.graphviz',
-              #'notfound.extension',
+              'notfound.extension',
               'autosectionlabel',
               'myst_parser',
               'sphinx_design',