You have two options depending on what you want...
If you want to remove a few particular classes from all the elements have it, you should use a code like this:
$('.open, .current, .more, .andmore').removeClass('.open .current .more .andmore');
If you want to clear all classes for elements with one of the specified class, do something like this:
$('.open, .current, .more, .andmore').removeClass();