code: function(className) {
  		if (this.classList) {
  			this.classList.remove(className);
  		} else if (has.call(this, className)) {
  			var reg = new RegExp('(\\s|^)' + className + '(\\s|$)');
  			this.className = this.className.replace(reg, ' ');
  		}
  	}
docs: @function can-util/dom/class-name/class-name.remove className.remove
  @parent can-util/dom/class-name/class-name
  @signature `className.remove.call(el, cls)`
  
  Remove a class name from a DOM node if it exists on the node
  
  ```js
  var className = require("can-util/dom/class-name/class-name");
  
  className.remove.call(el, "container");
  ```
  
  @param {String} className A string representing a single class name token
  
  @return {void}