No need to / There is no need to
This expression is used to indicate that there is no need for something to happen or be done.
Examples
心配することはないよ。
There is no need to worry.
そんなに急ぐことはない。
There is no need to hurry that much.
お礼を言うことはない。
There is no need to say thank you.
Quick check
心配する___よ。