Disable tabs in docs (#17211)

mkdocs.yml

@@ -9,7 +9,6 @@ theme:
     - header.autohide
     - navigation.footer
     - navigation.instant
-    - navigation.tabs
     - navigation.top
   palette:
     - media: "(prefers-color-scheme: light)"
@@ -107,8 +106,7 @@ nav:
       - Recipes and Starter Themes: getting-started/starter-recipes.md
       - Code Generation Templates: getting-started/templates/README.md
       - Create a Theme: getting-started/theme.md
-  - Glossary:
-      - Terms and Concepts: glossary/README.md
+  - Glossary: glossary/README.md
   - How-to guides:
       - Follow the Guides: guides/README.md
       - Create a modular application: guides/create-modular-application-mvc/README.md