Issue #2109833 by ianmthomasuk: Finish converting stream_public_path() to CMI.

core/modules/file/tests/file_test/lib/Drupal/file_test/DummyReadOnlyStreamWrapper.php

@@ -16,7 +16,7 @@
  */
 class DummyReadOnlyStreamWrapper extends LocalReadOnlyStream {
   function getDirectoryPath() {
-    return variable_get('stream_public_path', 'sites/default/files');
+    return 'sites/default/files';
   }
 
   /**