Refs #10120 remove return type ?string since ? is not supported by the PHP...

Refs #10120 remove return type ?string since ? is not supported by the PHP version of the gitlab runner. very sad.

extension/Classes/Core/Form/FormAsFile.php

@@ -387,7 +387,7 @@ class FormAsFile
      * @throws \DbException
      * @throws \UserFormException
      */
-    public static function formNameFromFormRelatedRecord(int $recordId, string $recordTable, Database $database): ?string
+    public static function formNameFromFormRelatedRecord(int $recordId, string $recordTable, Database $database)
     {
         if ($recordId === 0) {
             return null;