Issue #2081175 by smiro: Remove Unused local variable from...

Issue #2081175 by smiro: Remove Unused local variable  from /serialization/lib/Drupal/serialization/RegisterSerializationClassesCompilerPass.php.

core/modules/serialization/lib/Drupal/serialization/RegisterSerializationClassesCompilerPass.php

@@ -45,7 +45,7 @@ public function process(ContainerBuilder $container) {
 
     // Find all serialization formats known.
     $formats = array();
-    foreach ($container->findTaggedServiceIds('encoder') as $id => $attributes) {
+    foreach ($container->findTaggedServiceIds('encoder') as $attributes) {
       $formats[] = $attributes[0]['format'];
     }
     $container->setParameter('serializer.formats', $formats);