[ticket/12458] Apply Squiz.WhiteSpace.SuperfluousWhitespace.* to legacy code.

* There MUST NOT be trailing whitespace at the end of lines.
* There MUST NOT be whitespace before the first content of a file.
* There MUST NOT be whitespace after the last content of a file.
* Functions MUST NOT contain multiple empty lines in a row.

PHPBB3-12458

phpBB/includes/acp/auth.php

@@ -139,7 +139,6 @@ class auth_admin extends \phpbb\auth\auth
 					$auth2 = &$auth;
 				}
 
-
 				$hold_ary[$userdata['user_id']] = array();
 				foreach ($forum_ids as $f_id)
 				{