docs: Prepare for new sub tree

See #11925

docs/content/en/myshowcase/bio.md

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

docs/content/en/myshowcase/index.md

@@ -1,37 +0,0 @@
----
-
-title: Myshowcase
-date: 2021-01-14
-
-description: "A short description of this page."
-
-# The URL to the site on the internet.
-siteURL: https://gohugo.io/
-
-# Link to the site's Hugo source code if public and you can/want to share.
-# Remove or leave blank if not needed/wanted.
-siteSource: https://github.com/gohugoio/hugoDocs
-
-# Add credit to the article author. Leave blank or remove if not needed/wanted.
-byline: "[bep](https://github.com/bep), Hugo Lead"
-
----
-
-To complete this showcase:
-
-1. Write the story about your site in this file.
-2. Add a summary to the `bio.md` file in this folder.
-3. Replace the `featured-template.png` with a screenshot of your site. You can rename it, but it must contain the word `featured`.
-4. Create a new pull request in https://github.com/gohugoio/hugoDocs/pulls
-
-The content of this bundle explained:
-
-index.md
-: The main content file. Fill in required front matter metadata and write your story. I does not have to be a novel. It can even be self-promotional, but it should include Hugo in some form.
-
-bio.md
-: A short summary of the website. Site credits (who built it) fits nicely here.
-
-featured.png
-: A reasonably sized screenshot of your website. It can be named anything, but the name must start with "featured". The sample image is `1500x750` (2:1 aspect ratio).
-