Rmove upstream workflow

.github/workflows/arch.yml

@@ -1,37 +0,0 @@
-name: Arch Linux AUR Package Update
-
-on:
-  workflow_run:
-    workflows: [cmake]
-    branches: [main]
-    types: [completed]
-  workflow_dispatch:
-  push:
-    branches: [main]
-    paths:
-      - 'packaging/archlinux/**'
-      - '.github/workflows/**'
-
-jobs:
-  publish:
-    if: ${{ github.event.workflow_run.conclusion == 'success' }}
-    runs-on: ubuntu-latest
-    steps:
-
-      - name: Checkout
-        uses: actions/checkout@v2
-        with:
-          submodules: true
-
-      - name: Publish linux-wallpaperengine-git to the AUR
-        uses: KSXGitHub/github-actions-deploy-aur@v2.7.2
-        with:
-          pkgname: linux-wallpaperengine-git
-          pkgbuild: ./packaging/archlinux/PKGBUILD
-          commit_username: ${{ secrets.AUR_USERNAME }}
-          commit_email: ${{ secrets.AUR_EMAIL }}
-          ssh_private_key: ${{ secrets.AUR_SSH_PRIVATE_KEY }}
-          commit_message: Update AUR package
-          force_push: 'true'
-          test: true
-          test_flags: --clean --cleanbuild --nodeps --nobuild