code: public void removeMatch(String name, PseudoClassType pseudoClass)
      {
          if (names != null)
          {
              Set<PseudoClassType> classes = names.get(name);
              if (classes != null)
                  classes.remove(pseudoClass);
          }   
      }
docs: Removes the pseudo class from the given element name. Element names are case-insensitive.
  @param name the element name
  @param pseudoClass the pseudo class to be removed