There is no need to use speech marks.

不需要使用引号。

As it turned out, there was no need to be nervous because all my hard work paid off and I played perfectly.

结果证明，根本不需要紧张，因为我的努力得到了回报，我演奏得很完美。

This service is free, no need to pay.

这项服务是免费的，不需要付费。

You can take your time, no need to rush.

你可以慢慢来，不用赶时间。

I got it all you said, no need to repeat.

你说的我都知道了，不用再重复了。

The situation is controllable, no need to worry.

这种情况是可控制的，不需要担心。

This is a casual restaurant; no need to dress up.

这是一家随便的餐馆，不需要穿正装。

There's no need to fret; everything will be fine.

不必烦恼，一切都会好的。

There's no need to hurry; we have plenty of time.

没必要匆忙，我们有很多时间。

This is unnecessary worry; there's no need to worry.

你这是杞人忧天，没有必要担心。