chore: remove pr labeler requirement (#10081)

.github/workflows/pr-require-label.yml

@@ -1,17 +0,0 @@
-name: Enforce PR labels
-
-on:
-  pull_request:
-    types: [labeled, unlabeled, opened, edited, synchronize]
-  workflow_run:
-    workflows: ["Pull Request Labeler"]
-    types:
-      - completed
-jobs:
-  enforce-label:
-    name: Enforce label
-    runs-on: ubuntu-latest
-    steps:
-    - if: toJson(github.event.pull_request.labels) == '[]'
-      run: exit 1
-