fix: remove outdated codeql.yml (superseded by codeql-analysis.yml)

Old file used codeql-action@v2, checkout@v3, and only targeted master branch.
Replaced by codeql-analysis.yml which uses v3 actions and covers main+master.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.github/workflows/codeql.yml

@@ -1,40 +0,0 @@
-name: "CodeQL Analysis"
-
-on:
-  workflow_dispatch:
-  push:
-    branches: [ master ]
-  pull_request:
-    # The branches below must be a subset of the branches above
-    branches: [ master ]
-    types: [synchronize, opened, reopened]
-  schedule:
-    - cron: '22 17 * * 5'
-
-jobs:
-  analyze:
-    name: Analyze
-    runs-on: ubuntu-latest
-    permissions:
-      actions: read
-      contents: read
-      security-events: write
-
-    strategy:
-      fail-fast: false
-      matrix:
-        language: [ 'javascript' ]
-
-    steps:
-    - name: Checkout repository
-      uses: actions/checkout@v3
-
-    - name: Initialize CodeQL
-      uses: github/codeql-action/init@v2
-      with:
-        languages: ${{ matrix.language }}
-
-    - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v2
-      with:
-        category: "/language:${{matrix.language}}"