Remove advanced CodeQL workflow in favor of default setup (#4584)

The repo has both the CodeQL "default setup" (configured in repo
settings) and this advanced workflow file enabled. GitHub does not
allow both simultaneously, causing all PR CI runs to fail with:

  "CodeQL analyses from advanced configurations cannot be processed
   when the default setup is enabled"

Since the default setup already covers the same languages (Python,
JavaScript/TypeScript) with the same build-mode (none), remove the
redundant advanced workflow file.

.github/workflows/codeql.yml

@@ -1,46 +0,0 @@
----
-name: "CodeQL"
-
-on:
-  push:
-    branches: ["main"]
-  pull_request:
-    branches: ["main"]
-  schedule:
-    - cron: "25 14 * * 3"
-  workflow_dispatch:
-
-jobs:
-  analyze:
-    name: Analyze (${{ matrix.language }})
-    runs-on: ubuntu-latest
-    permissions:
-      security-events: write
-      packages: read
-      actions: read
-      contents: read
-
-    strategy:
-      fail-fast: false
-      matrix:
-        include:
-          - language: python
-            build-mode: none
-          - language: javascript-typescript
-            build-mode: none
-
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v6
-
-      - name: Initialize CodeQL
-        uses: github/codeql-action/init@v4
-        with:
-          languages: ${{ matrix.language }}
-          build-mode: ${{ matrix.build-mode }}
-
-      - name: Perform CodeQL Analysis
-        uses: github/codeql-action/analyze@v4
-        with:
-          category: "/language:${{ matrix.language }}"
-...