Remove unnecessary config

Author: spier

.github/workflows/generate-mindmap.yml

@@ -28,9 +28,6 @@ jobs:
 
     steps:
     - uses: actions/checkout@v5
-      with:
-        repository: ${{ github.event.pull_request.head.repo.full_name }}
-        ref: ${{ github.event.pull_request.head.ref }}
     - name: Use Node.js
       uses: actions/setup-node@v5
       with: