chore: remove labeler (#5748)

.github/workflows/label.yml

@@ -1,22 +0,0 @@
-# This workflow will triage pull requests and apply a label based on the
-# paths that are modified in the pull request.
-#
-# To use this workflow, you will need to set up a .github/labeler.yml
-# file with configuration.  For more information, see:
-# https://github.com/actions/labeler
-
-name: Labeler
-on: [pull_request_target]
-
-jobs:
-  label:
-
-    runs-on: ubuntu-latest
-    permissions:
-      contents: read
-      pull-requests: write
-
-    steps:
-    - uses: actions/labeler@v2
-      with:
-        repo-token: "${{ secrets.GITHUB_TOKEN }}"