chore: 刪除未使用的 GitHub Actions 範本 workflow

這些 Laravel 框架預設 workflow 被 Gitea runner 誤接，
導致大量殭屍容器佔用伺服器資源，目前專案也未實作測試

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.github/workflows/issues.yml

@@ -1,12 +0,0 @@
-name: issues
-
-on:
-  issues:
-    types: [labeled]
-
-permissions:
-  issues: write
-
-jobs:
-  help-wanted:
-    uses: laravel/.github/.github/workflows/issues.yml@main

.github/workflows/pull-requests.yml

@@ -1,12 +0,0 @@
-name: pull requests
-
-on:
-  pull_request_target:
-    types: [opened]
-
-permissions:
-  pull-requests: write
-
-jobs:
-  uneditable:
-    uses: laravel/.github/.github/workflows/pull-requests.yml@main

.github/workflows/tests.yml

@@ -1,47 +0,0 @@
-name: Tests
-
-on:
-  push:
-    branches:
-      - master
-      - '*.x'
-  pull_request:
-  schedule:
-    - cron: '0 0 * * *'
-
-permissions:
-  contents: read
-
-jobs:
-  tests:
-    runs-on: ubuntu-latest
-
-    strategy:
-      fail-fast: true
-      matrix:
-        php: [8.2, 8.3]
-
-    name: PHP ${{ matrix.php }}
-
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v4
-
-      - name: Setup PHP
-        uses: shivammathur/setup-php@v2
-        with:
-          php-version: ${{ matrix.php }}
-          extensions: dom, curl, libxml, mbstring, zip, pcntl, pdo, sqlite, pdo_sqlite
-          coverage: none
-
-      - name: Install Composer dependencies
-        run: composer install --prefer-dist --no-interaction --no-progress
-
-      - name: Copy environment file
-        run: cp .env.example .env
-
-      - name: Generate app key
-        run: php artisan key:generate
-
-      - name: Execute tests
-        run: vendor/bin/phpunit

.github/workflows/update-changelog.yml

@@ -1,13 +0,0 @@
-name: update changelog
-
-on:
-  release:
-    types: [released]
-
-permissions: {}
-
-jobs:
-  update:
-    permissions:
-      contents: write
-    uses: laravel/.github/.github/workflows/update-changelog.yml@main