An expression telling someone there's no need to worry; reassuring someone not to be concerned.
試験はよく勉強したから、心配いらないよ。
You studied well for the exam, so you don't need to worry.
荷物は明日届くから、心配要らないよ。
The package will arrive tomorrow, so don't worry.
そんなに気にすることはない。心配いらないって言ったでしょう。
There's nothing to be so worried about. I told you not to worry.
子どものことは私に任せて。心配要らないよ。
Leave the children to me. There's no need to worry.