chore: clear manual workflow

.github/workflows/manual-post.yaml

@@ -1,19 +0,0 @@
-name: Manual follow feed to Mastodon
-on: [workflow_dispatch]
-jobs:
-  JSONFeed2Mastodon:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v3
-      - name: Feed to Mastodon
-        uses: nhoizey/github-action-feed-to-mastodon@v2
-        with:
-          feedUrl: "https://coryd.dev/follow.json"
-          mastodonInstance: "https://social.lol"
-          mastodonToken: ${{ secrets.MASTODON_TOKEN }}
-          testMode: true
-      - name: Pull any changes from Git
-        run: git pull
-      - name: Commit and push
-        uses: stefanzweifel/git-auto-commit-action@v4