removing my_class

Seems busted in p6 and not used. Removed from init as well, this is just cleanup.
diff --git a/manifests/params.pp b/manifests/params.pp
index 0835364..8125a19 100644
--- a/manifests/params.pp
+++ b/manifests/params.pp
@@ -128,7 +128,6 @@
   $jails_template_footer = 'fail2ban/concat/jail.local-footer.erb'
 
   # General Settings
-  $my_class = ''
   $source = ''
   $template = ''
   $source_dir = ''