我有一个主题，我想从中删除自动生成的以下html内容：

<div style=\'position:fixed;left:0;right:0;bottom:0;background:#f00;text-align:center\'>Please return following links to the footer: <div class=\'smthemes\'>Designed by <a href=\'http://officielsiteici.com/\' target=\'_blank\'>http://officielsiteici.com/</a>, thanks to: <a href=\'http://galaxycoquefr.com/\' target=\'_blank\'>galaxycoquefr.com</a>, <a href=\'http://officielcoquefr.com/\' target=\'_blank\'>officielcoquefr</a> and <a href=\'http://coquesfrs5.com/\' target=\'_blank\'>r4 3ds</a></div></div>