Revert "Unlimit the number of open files on etherpad"

This reverts commit e737a1f533.

This didn't actually apply because upstart avoids limits.conf. Remove it
as we fixed this in upstart job directly.

Change-Id: I835c39af1643d42e30d95f0cc9586c4e04001628

modules/openstack_project/manifests/etherpad.pp

@@ -49,14 +49,6 @@ class openstack_project::etherpad (
     backup_user   => 'bup-etherpad',
     backup_server => 'ci-backup-rs-ord.openstack.org',
   }
-
-  include ulimit
-  ulimit::conf { 'unlimit_etherpad_files':
-    limit_domain => 'eplite',
-    limit_type   => 'hard',
-    limit_item   => 'nofile',
-    limit_value  => '10000'
-  }
 }
 
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