OPS: remove stupid automerge action

.github/workflows/automerge.yml

@@ -1,30 +0,0 @@
-name: automerge
-on:
-  pull_request:
-    types:
-      - labeled
-      - unlabeled
-      - synchronize
-      - opened
-      - edited
-      - ready_for_review
-      - reopened
-      - unlocked
-  pull_request_review:
-    types:
-      - submitted
-  check_suite:
-    types:
-      - completed
-  status: {}
-jobs:
-  automerge:
-    runs-on: ubuntu-latest
-    steps:
-      - name: automerge
-        uses: "pascalgn/automerge-action@v0.12.0"
-        env:
-          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
-          MERGE_LABELS: "!work in progress,!WIP,!DO NOT MERGE"
-          MERGE_FORKS: false
-          MERGE_DELETE_BRANCH: true