chore(ci): remove unused dependabot action

.github/workflows/autobot.yaml

@@ -1,28 +0,0 @@
-name: Auto-merge Dependabot
-
-on: pull_request
-
-jobs:
-  automerge:
-    name: Check and merge PR
-    runs-on: ubuntu-latest
-
-    permissions:
-      contents: write
-      pull-requests: write
-
-    if: github.actor == 'dependabot[bot]'
-
-    steps:
-      - uses: dependabot/fetch-metadata@v2
-        id: metadata
-        with:
-          github-token: ${{ github.token }}
-
-      # auto merge minor releases
-      - name: Enable auto-merge
-        if: steps.metadata.outputs.update-type == 'version-update:semver-patch' || steps.metadata.outputs.update-type == 'version-update:semver-minor'
-        run: gh pr merge --auto --rebase "$PR"
-        env:
-          GH_TOKEN: ${{ github.token }}
-          PR: ${{ github.event.pull_request.html_url }}