ci: remove List vendor directory contents

Author: utrodus

.github/workflows/tests.yaml

@@ -33,8 +33,5 @@ jobs:
       - name: Install Composer dependencies
         run: composer install --prefer-dist --no-dev --optimize-autoloader
 
-      - name: List vendor directory contents
-        run: ls -al vendor/bin
-
       - name: Run PHPUnit tests
         run: php vendor/bin/phpunit