Merge pull request #303 from saz/drop-purge_ignore-from-README

drop purge_ignore example, as it is not working as documented

README.md

@@ -39,31 +39,6 @@ If this is not what you're expecting, set `purge` and/or `config_file_replace` t
     }
 ```
 
-#### Selective Purge of sudoers.d Directory
-A combination of `prefix`, `suffix` and `purge_ignore` can be used to purge only files that puppet previously created.
-If `suffix` is specified all puppet created sudoers.d entries will have this suffix apprended to
-the thier file name. If `prefix` is specified all puppet created sudoers.d entries will have this prefix
-prepended. A ruby glob can be used as `ignore` to ignore all files that do not have
-this suffix.
-
-```puppet
-    class{'sudo':
-      suffix => '_puppet',
-      purge_ignore => '*[!_puppet]',
-    }
-```
-
-or
-
-```puppet
-    class{'sudo':
-      prefix => 'puppet_',
-      purge_ignore => '[!puppet_]*',
-    }
-```
-
-Due to limitations in ruby glob the prefix and ignore is recommended.
-
 #### Leave current sudo config as it is
 ```puppet
     class { 'sudo':