Are the Iranians Ready to Retire "Death to America"?

I certainly hope that the typical Iranian citizen has already retired the slogan Death to America which has been chanted ion front of cameras since 1979 SPC Andrew Griffin. However the Ayatollah, mullahs and members of the Qods Force will probably be chanting that in their minds until they die or are terminated with extreme prejudice.

so is this a good news? or like how Germany telling British "Peace of their time" thing during WW2?

The violence and kidnapping of American citizens will not stop. Even if their religious leader says it is just a slogan to go against US policy, there will always be those hardliners that will not listen to these words and still do what they are wanting to do. I honestly do not think the world wide religious violence will ever stop.