diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 50b6b1e94..d6158a73c 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -16,7 +16,6 @@ jobs:
         with:
           docs-folder: "docs/"
           pre-build-command: "pip install sphinx-markdown-tables nbsphinx jinja2 recommonmark sphinx_rtd_theme"
-      - uses: actions/checkout@v1
       - uses: ammaraskar/sphinx-action@master
         with:
           docs-folder: "docs_cn/"