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

This reverts commit 46d9cbe5ae.

_data/glossary/cla.yaml

@@ -1,9 +1,8 @@
 id: cla
 name: CLA (Contributor License Agreement)
-full-link: https://github.com/kubernetes/community/blob/master/CLA.md
 tags:
 - community
-short-description: >
-  Terms under which a {% glossary_tooltip text="contributor" term_id="contributor" %} grants a license to an open source project for their contributions.
-long-description: >
+short-description: |
+  Terms under which a [contributor](#term-contributor) grants a license to an open source project for their contributions.
+long-description: |
   CLAs help resolve legal disputes involving contributed material and intellectual property (IP).