remove: remove markdownlint job CI workflow

Author: tanthanhdev

.github/workflows/ci.yml

@@ -7,39 +7,23 @@ on:
     branches: [ main ]
 
 jobs:
-  markdown-lint:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-      
-      - name: Setup Node.js
-        uses: actions/setup-node@v3
-        with:
-          node-version: 16
-      
-      - name: Install markdownlint-cli
-        run: npm install -g markdownlint-cli
-      
-      - name: Run markdownlint
-        run: markdownlint '**/*.md' --ignore node_modules
-        
   check-links:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      
+
       - name: Setup Node.js
         uses: actions/setup-node@v3
         with:
           node-version: '16'
-      
+
       - name: Install dependencies
         run: npm install -g markdown-link-check
-      
+
       - name: Check links
         run: ./tools/check_links.sh
-        
+
       - name: Generate TOC
         run: |
           python3 ./tools/generate_summary.py
-          git diff --exit-code SUMMARY.md || (echo "SUMMARY.md is out of date. Please run ./tools/generate_summary.py and commit the changes" && exit 1) 
+          git diff --exit-code SUMMARY.md || (echo "SUMMARY.md is out of date. Please run ./tools/generate_summary.py and commit the changes" && exit 1)