Remove mailer as dependency

Author: loevgaard

composer.json

@@ -31,7 +31,6 @@
         "symfony/http-foundation": "^5.4 || ^6.0",
         "symfony/http-kernel": "^5.4 || ^6.0",
         "symfony/intl": "^5.4 || ^6.0",
-        "symfony/mailer": "^5.4 || ^6.0",
         "symfony/messenger": "^5.4 || ^6.0",
         "symfony/options-resolver": "^5.4 || ^6.0",
         "symfony/routing": "^5.4 || ^6.0",