Revert "Introduce custom Jekyll tags for better glossary integration" (#6160)

This reverts commit 46d9cbe5ae.

_data/glossary/_example.yml

@@ -1,6 +1,5 @@
 id: _example
 name: Example K8s Term
-full-link: kubernetes.io/docs/link-to-long-dedicated-docs-page
 aka:
 - Slang K8s Term
 - Misnomer
@@ -11,17 +10,8 @@ related:
 - id-of-commonly-used-with-term
 tags:
 - Some Tag
-short-description: >
-  Required.
-  Markdown allowed (e.g. for cross-linking).
-  One or two lines that provide a minimum definition.
-  Do not repeat the term.
-  Prefer fragments.
-  End with a period.
-long-description: >
-  Optional.
-  Markdown allowed.
-  Longer additional text to appear after (in conjunction with) short description.
-  Provide where the short description is not sufficient as the intro paragraph to a topic.
-  Write complete but concise sentences.
+short-description: |
+  Required. One or two lines that provide a minimum definition. Do not repeat the term. Write about the plural of the term. Prefer fragments. Model after tooltips. End with a period.
+long-description: |
+  Optional. Longer additional text to appear after (in conjunction with) short description. Provide where the short description is not sufficient as the intro paragraph to a topic. Write complete but concise sentences.
   **See /_includes/templates/glossary/README.md for the official style guide.**