ci: remove codeql matrix strategy (#14)

## Summary
- Remove matrix strategy from CodeQL analysis workflow, simplifying the
CI configuration

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Author: ben-miru

.github/workflows/codeql-analysis.yml

@@ -20,15 +20,8 @@ permissions:
 
 jobs:
   codeql:
-    name: CodeQL
     runs-on: ubuntu-latest
 
-    strategy:
-      fail-fast: false
-      matrix:
-        language:
-          - javascript
-
     steps:
       - name: Checkout
         id: checkout
@@ -39,7 +32,7 @@ jobs:
         uses: github/codeql-action/init@38697555549f1db7851b81482ff19f1fa5c4fedc # v4
         with:
           config-file: .github/codeql/codeql-config.yml
-          languages: ${{ matrix.language }}
+          languages: javascript
 
       - name: Autobuild
         id: autobuild