Removed failing GitHub Action

.github/workflows/php.yml

@@ -1,23 +0,0 @@
-name: PHP Composer
-
-on: [push]
-
-jobs:
-  build:
-
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@v1
-
-    - name: Install dependencies
-      run: composer install --prefer-dist --no-progress --no-suggest
-
-    - name: Run test suite
-      run: php bin/phpunit --exclude-group DB
-
-    # Add a test script to composer.json, for instance: "test": "vendor/bin/phpunit"
-    # Docs: https://getcomposer.org/doc/articles/scripts.md
-
-    # - name: Run test suite
-    #   run: composer run-script test