Use CodeQL without build

Author: offa

.github/workflows/codeql.yml

@@ -27,7 +27,6 @@ jobs:
         with:
           languages: cpp, actions
           queries: +security-and-quality
-      - name: Build
-        run: script/ci_build.sh
+          build-mode: none
       - name: CodeQL Analysis
         uses: github/codeql-action/analyze@v4