ci: remove super-linter workflow

Linting covered by existing tools:
- C#: StyleCop during build
- GitHub Actions: CodeQL
- Frontend: eslint in package.json

.github/workflows/super-linter.yml

@@ -1,38 +0,0 @@
-# Super Linter for code quality checks on changed files
-# https://github.com/super-linter/super-linter
-
-name: Lint Code Base
-
-on:
-  push:
-    branches: [develop, main]
-  pull_request:
-    branches: [develop]
-
-permissions:
-  contents: read
-  statuses: write
-
-jobs:
-  lint:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v6
-        with:
-          fetch-depth: 0
-
-      - name: Lint Code Base
-        uses: super-linter/super-linter/slim@v6
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          DEFAULT_BRANCH: develop
-          VALIDATE_ALL_CODEBASE: false
-          # Disable linters not needed or handled elsewhere
-          VALIDATE_CSHARP: false
-          VALIDATE_JSCPD: false
-          VALIDATE_NATURAL_LANGUAGE: false
-          VALIDATE_MARKDOWN: false
-          VALIDATE_GITLEAKS: false
-          VALIDATE_CHECKOV: false
-          VALIDATE_GITHUB_ACTIONS: false