chore: remove broken Gitea Actions workflow

act_runner cannot execute workflows (115 runs / 0 successes ever; tracked in tech-debt #115). Auto-deploys now run from operator-deploy-vercel.sh on the Hetzner host via cron poll. Same Gitea push trigger, different executor.

.gitea/workflows/deploy-vercel.yml

@@ -1,57 +0,0 @@
-# Gitea Actions workflow — deploy to Vercel via CLI on push to main/staging.
-#
-# Replaces github.com push triggers (the Vercel→GitHub integration). With
-# Gitea as canonical SCM, we drive deploys from here. Same Vercel project,
-# same domains — only the trigger source changes.
-#
-# Drop this file at .gitea/workflows/deploy-vercel.yml in each Vercel-hosted
-# repo: landingpage, molecule-app, docs, molecules-market.
-#
-# Required Gitea secrets (Settings → Actions → Secrets):
-#   VERCEL_TOKEN        — gitea-actions-ci token from vercel.com/account/tokens
-#   VERCEL_ORG_ID       — team ID (team_… for team scope)
-#   VERCEL_PROJECT_ID   — per-repo prj_…
-#
-# All three are set automatically by the operator-host bootstrap script.
-
-name: deploy-vercel
-on:
-  push:
-    branches: [main, staging]
-
-env:
-  # Vercel CLI reads these from env when no .vercel/project.json is present
-  VERCEL_TOKEN: ${{ secrets.VERCEL_TOKEN }}
-  VERCEL_ORG_ID: ${{ secrets.VERCEL_ORG_ID }}
-  VERCEL_PROJECT_ID: ${{ secrets.VERCEL_PROJECT_ID }}
-
-jobs:
-  deploy:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-
-      - uses: actions/setup-node@v4
-        with:
-          node-version: 20
-
-      - name: Install Vercel CLI
-        run: npm install -g vercel@latest
-
-      - name: Pull environment + build + deploy
-        run: |
-          set -eu
-          if [ "${{ github.ref_name }}" = "main" ]; then
-            ENV_FLAG=production
-            DEPLOY_FLAGS="--prebuilt --prod"
-          else
-            ENV_FLAG=preview
-            DEPLOY_FLAGS="--prebuilt"
-          fi
-
-          vercel pull --yes --environment=$ENV_FLAG --token=$VERCEL_TOKEN
-          vercel build $( [ "$ENV_FLAG" = "production" ] && echo --prod ) --token=$VERCEL_TOKEN
-
-          url=$(vercel deploy $DEPLOY_FLAGS --token=$VERCEL_TOKEN)
-          echo "Deployed: $url"
-          echo "deployment_url=$url" >> "$GITHUB_OUTPUT"