Revert "Ubuntu: Purge the default policy.yaml for Placement"

This reverts commit 71197c8581.

Conflicts:
	manifests/placement.pp

Reason for revert:
The original bug 1987984 turned out to be a duplicate of bug 1945336,
which was already fixed.

Related-Bug: #1945336
Related-Bug: #1987984
Change-Id: I808535454985764a94434443633fde7997ab1d21

manifests/placement.pp

@@ -54,12 +54,6 @@ class openstack_integration::placement {
     }),
   }
   include placement::db::sync
-  # TODO(tkajinam): Remove this once lp bug 1987984 is fixed.
-  if $facts['os']['name'] == 'Ubuntu' {
-    class { 'placement::policy':
-      purge_config => true
-    }
-  }
   include placement::api
   if ($facts['os']['name'] != 'Debian') {
     class { 'placement::wsgi::apache':