build: Remove automerge script

.github/workflows/auto_merge.yaml

@@ -1,15 +0,0 @@
-name: Auto merge
-
-on: pull_request_target
-
-jobs:
-  automerge:
-    runs-on: ubuntu-latest
-    permissions:
-      pull-requests: write
-    if: github.actor == 'dependabot[bot]' || github.actor == 'weblate'
-    steps:
-      - uses: reitermarkus/automerge@v2
-        with:
-          token: ${{ secrets.GITHUB_TOKEN }}
-          merge-method: rebase