chore: rm mirroring script

.github/workflows/mirroring.yml

@@ -1,16 +0,0 @@
-name: Mirroring
-
-on:
-    push:
-        branches:
-            - "master"
-
-jobs:
-    to_gitlab:
-        runs-on: ubuntu-18.04
-        steps:
-            - uses: actions/checkout@v1
-            - uses: pixta-dev/repository-mirroring-action@v1
-              with:
-                  target_repo_url: git@gitlab.com:insert/revolt-vite.git
-                  ssh_private_key: ${{ secrets.GITLAB_SSH_PRIVATE_KEY }}