Merge pull request #39978 from joshtrichards/jr-cfg-sample-trystack-remove

(config sample) Remove defunct trystack.org url

config/config.sample.php

@@ -1591,7 +1591,6 @@ $CONFIG = [
  * filesystem and encryption will cause severe overhead because key files need
  * to be fetched in addition to any requested file.
  *
- * One way to test is applying for a trystack account at http://trystack.org/
  */
 'objectstore' => [
 	'class' => 'OC\\Files\\ObjectStore\\Swift',