Update validate_markdown.yml

.github/workflows/validate_markdown.yml

@@ -45,25 +45,6 @@ jobs:
     - name: Check out code
       uses: actions/checkout@v4.1.0
 
-    # https://github.com/actionshub/markdownlint
-    - name: Markdown Lint
-      uses: actionshub/markdownlint@main
-
-    # https://github.com/marketplace/actions/markdownlint-cli2-action
-    - name: Identify changed files
-      uses: tj-actions/changed-files@v41
-      id: changed-files
-      with:
-        files: '**/*.md'
-        separator: ","
-    - name: Markdown Lint
-      uses: DavidAnson/markdownlint-cli2-action@v14
-      if: steps.changed-files.outputs.any_changed == 'true'
-      with:
-        globs: ${{ steps.changed-files.outputs.all_changed_files }}
-        separator: ","
-        config: '.rules/custom.markdownlint.jsonc'
-
     # https://github.com/gaurav-nelson/github-action-markdown-link-check  
     - name: Markdown links
       uses: gaurav-nelson/github-action-markdown-link-check@v1