No out of date chocolate is not dangerous to eat.
When chocolate goes out of date the out of date chocolate is still safe to eat and there's no need to worry about getting sick or anything from it.
Chocolate is still safe to eat well past the expiration date although it just loses it's texture and taste once it gets out of date.
There's no need to throw the out of date chocolate out as it's still okay to eat but may not taste as good.
When my Grandma died she had chocolate that was 10 years old leftover and it was still good to eat.
My dad wanted to throw it out but I told him it was still okay and I took it and used it in baked goods to make things with the chocolate.