Do nothing if logrotate isn't configured

Because:
- No means: I want to mange it myself, and I don't want you to remove
  the file, stupid.

manifests/init.pp

@@ -272,6 +272,9 @@ class uwsgi (
                 content => template('uwsgi/uwsgi_logrotate.erb'),
             }
         }
+        'no': {
+          # Do nothing
+        }
         default: {
             file { '/etc/logrotate.d/uwsgi':
                 ensure  => 'absent',