Remove trailing semicolon
Remove trailing semicolon

This is added in the template used by the defined type:
https://github.com/alphagov/puppet-nginx-jfryman/blob/master/templates/vhost/vhost_location_directory.erb#L2-L3

alphagov/govuk_mirror-puppet,alphagov/govuk_mirror-puppet,alphagov/govuk_mirror-puppet