Error on ldap_server.settings form

The attached patch removes unshifting the submit handler which is empty (at least for me on 8.0.6).

I presume the original comment wanted to indicate the ordering for ldap_help's sake, or other modules which should have run after setting those base parameters. Unless there are other modules which inject here as well and for which ordering could then differ (though I can't imagine how) this should be safe.