Set mailer dns in dist null://null

Author: tatevikg1

config/parameters.yml.dist

@@ -26,7 +26,7 @@ parameters:
     app.mailer_from: '%%env(MAILER_FROM)%%'
     env(MAILER_FROM): '[email protected]'
     app.mailer_dsn: '%%env(MAILER_DSN)%%'
-    env(MAILER_DSN): 'smtp://username:[email protected]:2525'
+    env(MAILER_DSN): 'null://null'
     app.confirmation_url: '%%env(CONFIRMATION_URL)%%'
     env(CONFIRMATION_URL): 'https://example.com/confirm/'