docs: Prepare for new sub tree

See #11925

docs/_vendor/github.com/gohugoio/gohugoioTheme/theme.toml

@@ -1,15 +0,0 @@
-# theme.toml template for a Hugo theme
-# See https://github.com/gohugoio/hugoThemes#themetoml for an example
-
-name = "Hugo Theme"
-license = "MIT"
-licenselink = "https://github.com/gohugoio/gohugoioTheme/blob/master/license.md"
-description = ""
-homepage = "https://github.com/gohugoio/gohugoioTheme"
-tags = ["website"]
-features = ["", ""]
-min_version = 0.38
-
-[author]
-  name = "Bud Parr"
-  homepage = "https://github.com/budparr"