hard feelings 怨气

A: Man, I'm really sorry about what happened last night.

A: 老兄啊! 昨晚的事真是抱歉..

B: It's all right. It's over with. No hard feelings.

B: 没关系。已经过去了。没什么好生气了。

"It's over with" 是「已经过去了」。结束某种不愉快的情绪, 可以用 「get over」。 如 "I know you were mad at him for what he had done. But, it has been five years. Get over it."
我知道你很气他所作的事, 但是这已经是五年前的事了, 你应该释怀了。