Issue #3272536: API change: Remove filename from actionManager configuration context

src/Controller/HandlePdfController.php

@@ -262,10 +262,6 @@ class HandlePdfController extends ControllerBase {
       $action_plugin_id = $redirect ? 'redirect' : 'save';
     }
 
-    // @todo Remove in FillPDF 5.x. The filename is not part of the context and
-    // is separately available anyway.
-    $context['filename'] = $filename;
-
     $action_configuration = [
       'form' => $fillpdf_form,
       'context' => $context,