Do not upgrade test-framework during Q&A

.github/workflows/php.yml

@@ -144,9 +144,6 @@ jobs:
       - name: Install Composer dependencies
         run: composer install --no-progress --no-suggest --prefer-dist --optimize-autoloader
 
-      - name: Install test framework
-        run: composer require simplesamlphp/simplesamlphp-test-framework --dev
-
       - name: Syntax check YAML / XML / JSON
         run: |
           bash vendor/bin/check-syntax-yaml.sh