What Happens When You Delete Class?

Does anything get deleted from your bank? If so, what?
I want to some of my classes (not create new ones) but wonder if my bank will be affected. If not, does this mean that you can get infinite quest items?

 

If you think about it, all your classes share a common bank. Unless you're asking if your items in the bank will get deleted if you delete all your classes, which I have no idea about, you won't lose anything in your bank if you delete some classes. And yes, you can get infinite quest items.

 

If you delete a class...
POOF!
The class is gone forever and so are the items in the inventory of that class.

However, everything you put in your bank stays since you share it with other classes as well.