[mod] ci: remove security (#6400)

Manage alerts directly from Docker Hub

.github/workflows/security.yml

@@ -1,46 +0,0 @@
----
-name: Security
-
-# yamllint disable-line rule:truthy
-on:
-  workflow_dispatch:
-  schedule:
-    - cron: "42 05 * * *"
-
-concurrency:
-  group: ${{ github.workflow }}
-  cancel-in-progress: false
-
-permissions:
-  contents: read
-
-jobs:
-  container:
-    if: github.repository_owner == 'searxng'
-    name: Container
-    runs-on: ubuntu-24.04-arm
-    permissions:
-      security-events: write
-
-    steps:
-      - name: Checkout
-        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0  # v7.0.0
-        with:
-          persist-credentials: "false"
-
-      - name: Sync GHCS from Docker Scout
-        uses: docker/scout-action@2688993af7bafd6ba8c6a74ec652442be91dd82b  # v1.23.1
-        with:
-          organization: "searxng"
-          dockerhub-user: "${{ secrets.DOCKER_USER }}"
-          dockerhub-password: "${{ secrets.DOCKER_TOKEN }}"
-          image: "registry://ghcr.io/searxng/searxng:latest"
-          command: "cves"
-          sarif-file: "./scout.sarif"
-          exit-code: "false"
-          write-comment: "false"
-
-      - name: Upload SARIFs
-        uses: github/codeql-action/upload-sarif@99df26d4f13ea111d4ec1a7dddef6063f76b97e9  # v4.37.0
-        with:
-          sarif_file: "./scout.sarif"