🔥(ci) drop unused Crowdin workflows

The Crowdin workflows were not used by the project and had turned
into dead CI code.

Remove them to reduce noise and keep the CI configuration limited
to what is actually running.

.github/workflows/crowdin-download.yml

@@ -1,33 +0,0 @@
-name: Download Crowdin translations
-
-on:
-  workflow_dispatch:
-    types: [file-fully-translated]
-
-permissions:
-  contents: write
-  pull-requests: write
-
-jobs:
-  crowdin:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@d23441a48e516b6c34aea4fa41551a30e30af803 # v6.1.0
-
-      - name: Download Crowdin files
-        uses: crowdin/github-action@c7af9bc98b01694653031fef2a0dc6c7888ce9bc # v2.17.0
-        with:
-          upload_sources: false
-          upload_translations: false
-          download_translations: true
-          localization_branch_name: l10n_crowdin_translations
-          create_pull_request: true
-          pull_request_title: "New Crowdin translations"
-          pull_request_body: "New Crowdin pull request with translations"
-          pull_request_base_branch_name: "main"
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          CROWDIN_PROJECT_ID: ${{ secrets.CROWDIN_PROJECT_ID }}
-          CROWDIN_PERSONAL_TOKEN: ${{ secrets.CROWDIN_PERSONAL_TOKEN }}
-          CROWDIN_BASE_PATH: ${{ github.workspace }}