feat: remove checkout ref

Author: hyiso

.github/workflows/pr_commits.yml

@@ -8,9 +8,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-        with:
-          fetch-depth: 0
-          ref: ${{ github.head_ref }}
 
       - uses: dart-lang/[email protected]