revert: #889 (#896)

This reverts commit a2b1490.

docs/guide/theme-prev-next-link.md

@@ -1,53 +1,3 @@
 # Prev Next Link
 
-Prev or Next Link allows you to add buttons at the end of each page that allow you to go to the previous or next topic. To enable it, add `themeConfig.prev` or `themeConfig.next` to your configuration.
-
-
-## prev
-
-- Type: `NavLink | string`
-
-- Details:
-
-  Specify the link of the previous page.
-
-  If you don't set this frontmatter, the link will be inferred from the sidebar config.
-
-  To configure the prev link manually, you can set this frontmatter to a `NavLink` object or a string:
-
-  - A `NavLink` object should have a `text` field and a `link` field.
-  - A string should be the path to the target page file. It will be converted to a `NavLink` object, whose `text` is the page title, and `link` is the page route path.
-
-- Example:
-
-```md
----
-# NavLink
-prev:
-  text: Get Started
-  link: /guide/getting-started.html
-
-# NavLink - external url
-prev:
-  text: GitHub
-  link: https://github.com
-
-# string - page file path
-prev: /guide/getting-started.md
-
-# string - page file relative path
-prev: ../../guide/getting-started.md
----
-```
-
-## next
-
-- Type: `NavLink | string`
-
-- Details:
-
-  Specify the link of the next page.
-
-  If you don't set this frontmatter, the link will be inferred from the sidebar config.
-
-  The type is the same as [prev](#prev) frontmatter.
+Documentation coming soon...