Issue #3327950 by xjm, longwave: Remove last remaining list() from core

(cherry picked from commit 8a90cc9d39)

core/modules/link/src/Plugin/Field/FieldWidget/LinkWidget.php

@@ -72,7 +72,7 @@ class LinkWidget extends WidgetBase {
       $displayable_string = $uri_reference;
     }
     elseif ($scheme === 'entity') {
-      list($entity_type, $entity_id) = explode('/', substr($uri, 7), 2);
+      [$entity_type, $entity_id] = explode('/', substr($uri, 7), 2);
       // Show the 'entity:' URI as the entity autocomplete would.
       // @todo Support entity types other than 'node'. Will be fixed in
       //   https://www.drupal.org/node/2423093.