Lint without checkout

Author: dtolnay

.github/workflows/lint.yml

@@ -38,6 +38,4 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: dtolnay/install-buck2@latest
-      - name: git submodule init
-        uses: ./.github/actions/checkout
       - run: git ls-files '*.bzl' '*.bxl' | xargs buck2 starlark lint