docs: Prepare for new sub tree

See #11925

docs/content/en/showcase/template/bio.md

@@ -1,7 +0,0 @@
-
-Add some **general info** about the site here.
-
-The site is built by:
-
-* [Person 1](https://example.org)
-* [Person 1](https://example.org)

docs/content/en/showcase/template/index.md

@@ -1,18 +0,0 @@
----
-title: Hugo Showcase Template
-date: 2018-02-07
-description: "A short description of this page."
-siteURL: https://gohugo.io/
-siteSource: https://github.com/gohugoio/hugoDocs
-byline: "[bep](https://github.com/bep), Hugo Lead"
----
-Have a **notable Hugo site[^1]**? We would love to feature it in this **Showcase Section**
-
-Please:
-
-1. Fork https://github.com/gohugoio/hugoDocs.
-2. Run `hugo new content showcase/your-site`. This will use the archetype bundle in the [docs repo](https://github.com/gohugoio/hugoDocs/tree/master/archetypes).
-3. Follow the instructions in the newly created page bundle.
-4. Create a new pull request in https://github.com/gohugoio/hugoDocs/pulls.
-
-[^1]: We want this to show Hugo in its best light, so this is not for the average Hugo blog. In most cases the answer to "Is my site [notable](https://www.dictionary.com/browse/notable)?" will be obvious, but if in doubt, create an [issue](https://github.com/gohugoio/hugoDocs/issues) with a link and some words, and we can discuss it. But if you have a site with an interesting Hugo story or a company site where the company itself is notable, you are most welcome.