ci: remove gitleaks step (requires paid license for orgs)

Author: bakerboy448

.github/workflows/ci.yml

@@ -37,13 +37,6 @@ jobs:
       - name: npm audit
         run: npm audit --audit-level=high
 
-      # Secret scanning with gitleaks
-      - name: Gitleaks secret scan
-        uses: gitleaks/gitleaks-action@v2
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          GITLEAKS_LICENSE: ${{ secrets.GITLEAKS_LICENSE }}
-
       # Build output size gate — single-file HTML should stay under 150 KB
       - name: Build and check output size
         run: |