Revert "ci: Add workflow to automatically merge main into compat on tag push"

This reverts commit 9930f3fa2e.

.github/workflows/merge-main-into-compat.yml

@@ -1,28 +0,0 @@
-name: Merge Main Into Compat
-
-on:
-  push:
-    tags:
-      - v*
-
-jobs:
-  merge:
-    runs-on: ubuntu-latest
-    permissions:
-      contents: write
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
-      - name: Configure git user
-        run: |
-          git config user.name "github-actions[bot]"
-          git config user.email "github-actions[bot]@users.noreply.github.com"
-      - name: Merge main into compat
-        run: |
-          git fetch origin compat
-          git checkout compat
-          git merge --no-edit origin/main
-      - name: Push compat
-        run: |
-          git push origin compat