Remove redis tunnel from staging configuration.

(imported from commit 855cec4607fb6dc3913db8d0ddab2184849b135e)

puppet/zulip_internal/manifests/staging_app_frontend.pp

@@ -31,16 +31,6 @@ class zulip_internal::staging_app_frontend {
     mode => 644,
     source => "puppet:///modules/zulip_internal/cron.d/clearsessions",
   }
-  file { "/etc/supervisor/conf.d/redis_tunnel.conf":
-    require => Package["supervisor", "autossh"],
-    ensure => file,
-    owner => "root",
-    group => "root",
-    mode => 644,
-    source => "puppet:///modules/zulip_internal/supervisor/conf.d/redis_tunnel.conf.staging",
-    notify => Service["supervisor"],
-  }
-
 
   # Staging has our Apple Push Notifications Service private key at
   # /etc/ssl/django-private/apns-dev.pem