build: rm crowdin-sync (#6793)

.github/workflows/crowdin-sync.yaml

-name: Crowdin Download
-
-on:
-  schedule:
-    # Download translations every hour.
-    # This is not done as part of the build so that builds remain reproducible.
-    - cron: '0 * * * *'
-  # manual trigger
-  workflow_dispatch:
-
-jobs:
-  download-translations:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-      - uses: ./.github/actions/setup
-      - run: yarn i18n:extract
-
-      - name: Download Crowdin translations
-        uses: crowdin/github-action@3133cc916c35590475cf6705f482fb653d8e36e9
-        with:
-          upload_sources: false
-          download_translations: true
-          project_id: 458284
-          token: ${{ secrets.CROWDIN_PERSONAL_TOKEN_SECRET }}
-          source: 'src/locales/en-US.po'
-          translation: 'src/locales/%locale%.po'
-          create_pull_request: true
-          pull_request_title: 'chore(i18n): new Crowdin translations'
-          localization_branch_name: l10n_crowdin
-          commit_message: 'chore(i18n): synchronize translations from crowdin [skip ci]'
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}