Merge branch '6.4' into 7.2

* 6.4:
  [Validator] Review Latvian translations
  Fixed lazy-loading ghost objects generation with property hooks with default values.
  remove no longer used service definition
  [Config] Fix generated comment for multiline "info"
  Fix: exclude remember_me from security login authenticators

Author: alexandre-daubois

Resources/config/mailer.php

@@ -45,7 +45,6 @@
                 tagged_iterator('mailer.transport_factory'),
             ])
 
-        ->set('mailer.default_transport', TransportInterface::class)
         ->alias('mailer.default_transport', 'mailer.transports')
         ->alias(TransportInterface::class, 'mailer.default_transport')