chore: drop speedlify

.github/workflows/scheduled-speedlify-build.yaml

@@ -1,12 +0,0 @@
-name: Scheduled Speedlify test
-on:
-  workflow_dispatch:
-  schedule:
-    - cron: '0 0 * * *'
-jobs:
-  build:
-    name: Request Netlify Webhook
-    runs-on: ubuntu-latest
-    steps:
-      - name: POST to Build Hook
-        run: curl -X POST -d {} https://api.netlify.com/build_hooks/${{ secrets.SPEEDLIFY_NETLIFY_BUILD_KEY }}