Delete unused settings.symfony.php

web/sites/default/environments/settings.symfony.php

@@ -1,13 +0,0 @@
-<?php
-
-$databases['default']['default'] = [
-  'driver' => $_SERVER['DATABASE_DRIVER'],
-  'host' => $_SERVER['DATABASE_HOST'],
-  'database' => $_SERVER['DATABASE_NAME'],
-  'username' => $_SERVER['DATABASE_USER'],
-  'password' => $_SERVER['DATABASE_PASSWORD'],
-  'port' => $_SERVER['DATABASE_PORT'],
-  'prefix' => '',
-  'namespace' => 'Drupal\\Core\\Database\\Driver\\mysql',
-  'collation' => 'utf8mb4_general_ci',
-];