diff --git a/core/modules/system/src/Tests/Asset/ResolvedLibraryDefinitionsFilesMatchTest.php b/core/modules/system/src/Tests/Asset/ResolvedLibraryDefinitionsFilesMatchTest.php
index f894d1d..18b5f69 100644
--- a/core/modules/system/src/Tests/Asset/ResolvedLibraryDefinitionsFilesMatchTest.php
+++ b/core/modules/system/src/Tests/Asset/ResolvedLibraryDefinitionsFilesMatchTest.php
@@ -188,9 +188,6 @@ protected function getAllLibraries() {
     $libraries['core'] = $this->libraryDiscovery->getLibrariesByExtension('core');
 
     $root = \Drupal::root();
-    // By merging $modules and $themes into $extensions we're assuming that a
-    // module and theme don't share names. If they did, their libraries would
-    // conflict anyway.
     foreach ($extensions as $extension_name => $extension) {
       $library_file = $extension->getPath() . '/' . $extension_name . '.libraries.yml';
       if (is_file($root . '/' . $library_file)) {