docs: Prepare for new sub tree

See #11925

docs/config/_default/params.toml

@@ -1,27 +0,0 @@
-
-description = "The world’s fastest framework for building websites"
-## Setting this to true will add a "noindex" to *EVERY* page on the site..
-removefromexternalsearch = false
-## Gh repo for site footer (include trailing slash)
-ghrepo = "https://github.com/gohugoio/hugoDocs/"
-## GH Repo for filing a new issue
-github_repo = "https://github.com/gohugoio/hugo/issues/new"
-### Edit content repo (set to automatically enter "edit" mode; this is good for "improve this page" links)
-ghdocsrepo = "https://github.com/gohugoio/hugoDocs/tree/master/docs"
-## Discuss Forum URL
-forum = "https://discourse.gohugo.io/"
-## Google Tag Manager
-gtmid = ""
-
-# First one is picked as the Twitter card image if not set on page.
-images = ["images/gohugoio-card.png"]
-
-flex_box_interior_classes = "flex-auto w-100 w-40-l mr3 mb3 bg-white ba b--moon-gray nested-copy-line-height"
-
-#sidebar_direction = "sidebar_left"
-
-[social]
-  twitter = "GoHugoIOv2"
-
-[render_hooks.link]
-  errorLevel = 'warning' # ignore (default), warning, or error (fails the build)