Remove duplicate CodeQL workflow

.github/workflows/codeql.yml

@@ -1,61 +0,0 @@
-# CodeQL code scanning
-#
-# Purpose: GitHub's own static analysis engine reads the application source
-# (Python backend + the JavaScript frontend) and looks for real
-# vulnerabilities -- SQL/command injection, path traversal, auth mistakes,
-# unsafe deserialization. Findings appear in the repo's Security tab. This is
-# the deepest check in the suite and the most valuable for a high-profile
-# target.
-#
-# It runs on every push to main and on a weekly schedule (to catch newly
-# disclosed query patterns against unchanged code). It deliberately does NOT
-# run on pull requests: most PRs here come from forks, whose read-only token
-# cannot publish results, which would produce confusing failures. To scan pull
-# requests too, a maintainer can instead enable CodeQL "default setup" in
-# Settings -> Security -> Code scanning (one toggle, no file needed) -- see
-# docs/security-ci.md.
-
-name: CodeQL
-
-on:
-  push:
-    branches: [main]
-  schedule:
-    # Weekly, Monday 06:00 UTC.
-    - cron: '0 6 * * 1'
-  workflow_dispatch:
-
-permissions: {}
-
-concurrency:
-  group: codeql-${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
-jobs:
-  analyze:
-    name: Analyze (${{ matrix.language }})
-    runs-on: ubuntu-latest
-    permissions:
-      contents: read
-      security-events: write  # publish results to the Security tab
-    strategy:
-      fail-fast: false
-      matrix:
-        # Both are interpreted, so CodeQL needs no build step (build-mode none).
-        language: [python, javascript-typescript]
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10  # v6.0.3
-        with:
-          persist-credentials: false
-
-      - name: Initialize CodeQL
-        uses: github/codeql-action/init@8aad20d150bbac5944a9f9d289da16a4b0d87c1e  # v4.36.2
-        with:
-          languages: ${{ matrix.language }}
-          build-mode: none
-
-      - name: Perform CodeQL analysis
-        uses: github/codeql-action/analyze@8aad20d150bbac5944a9f9d289da16a4b0d87c1e  # v4.36.2
-        with:
-          category: "/language:${{ matrix.language }}"