Correct a jslint warning

This patch removes comma at the end of list, just because of jslint warning.
It does not have any impact on functionality.

https://fedorahosted.org/freeipa/ticket/5937

Reviewed-By: Martin Basti <mbasti@redhat.com>

install/ui/src/freeipa/trust.js

@@ -149,7 +149,7 @@ return {
                             $type: 'multivalued',
                             name: 'ipantadditionalsuffixes',
                             read_only: true
-                        },
+                        }
                     ]
                 },
                 {