[ticket/9556] Drop php closing tags, add trailing newline

Closing tags converted using Oleg's script.
remove-php-end-tags.py -a .

Trailing newlines added using the following where $ext is file extension.
find . -type f -name "*.$ext" -print | xargs printf "e %s\nw\n" | ed -s;

Extensions: php, css, html, js, xml.

PHPBB3-9556

phpBB/includes/mcp/mcp_forum.php

@@ -447,5 +447,3 @@ function merge_topics($forum_id, $topic_ids, $to_topic_id)
 		trigger_error($user->lang[$success_msg] . '<br /><br />' . $return_link);
 	}
 }
-
-?>