Removes a CSS class from a component.
Signature
removeClass(Object element, String newClass)
Parameters
element: Type: Object. The component to remove the class from.
newClass: Type: String. The CSS class to be removed.
Sample Code
//find a component with aura:id="myCmp" in markup
var myCmp = component.find("myCmp");
$A.util.removeClass(myCmp, "myClass");