Upgrade phpstan (#1458)

* Upgrade phpstan

* Remove dead generated code

The isset check ensures that this value is not null or missing.

* Remove dead code

* Fix the case when calling the fixCs method

Author: stof

src/Connector/AsyncAwsSqsConnector.php

@@ -18,8 +18,8 @@ public function connect(array $config)
     {
         $clientConfig = [];
         if (isset($config['key']) && isset($config['secret'])) {
-            $clientConfig['accessKeyId'] = $config['key'] ?? null;
-            $clientConfig['accessKeySecret'] = $config['secret'] ?? null;
+            $clientConfig['accessKeyId'] = $config['key'];
+            $clientConfig['accessKeySecret'] = $config['secret'];
             $clientConfig['sessionToken'] = $config['token'] ?? null;
         }