There is no need which is for you to worry.
There is no need that you should worry.
此两句都不符合英语表达。造句要尊重英语表达习惯,不要根据语法结构乱拼凑。本句不定式作定语,它的逻辑主语可以指任何人:There is no need to worry. 不一定单独指“你”,所以转化为从句时,主语受限。
关于以上两句,第一句 for you 可以保留,但 which is 纯是画蛇添足。
第二句,改为同位语从句实属勉强。