use repo ranger instead of custom GH action

.github/ranger.yml

@@ -27,6 +27,10 @@ commits:
     pattern: 'upgrade dep'
     labels:
       - maintenance
+  - action: label
+    user: 'allcontributors[bot]'
+    labels:
+      - 'squash when passing'
 
 sponsor_labels:
   - sponsor

.github/workflows/label-all-contributors.yml

@@ -1,20 +0,0 @@
-name: Auto-merge All-Contributors bot
-
-on: pull_request
-
-jobs:
-  apply-label:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/github-script@0.9.0
-        with:
-          github-token: ${{secrets.GITHUB_TOKEN}}
-          script: |
-            if (context.payload.pull_request.user.login === 'allcontributors[bot]') {
-              github.issues.addLabels({
-                issue_number: context.payload.pull_request.number,
-                owner: context.repo.owner,
-                repo: context.repo.repo,
-                labels: ['squash when passing']
-              })  
-            }