code: public void remove(String ID) {
          String[] stv = TransliteratorIDParser.IDtoSTV(ID);
          // Only need to do this if ID.indexOf('-') < 0
          String id = TransliteratorIDParser.STVtoID(stv[0], stv[1], stv[2]);
          registry.remove(new CaseInsensitiveString(id));
          removeSTV(stv[0], stv[1], stv[2]);
          availableIDs.remove(new CaseInsensitiveString(id));
      }
docs: Unregister an ID.  This removes an entry from the dynamic store
  if there is one.  The static locale resource store is
  unaffected.