Remove fetching step in build docs action (#289)

remove fetching step

Author: ziw-liu

.github/workflows/docs.yml

@@ -24,10 +24,6 @@ jobs:
         uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      - name: Fetch main
-        run: |
-          git fetch origin main:main
-          git status
       - name: Setup Pages
         id: pages
         uses: actions/configure-pages@v3