[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/functions_admin.php

@@ -3337,5 +3337,3 @@ function enable_bitfield_column_flag($table_name, $column_name, $flag, $sql_more
 		' . $sql_more;
 	$db->sql_query($sql);
 }
-
-?>