Remove old pear libraries

lib/php/UNL/DWT.php

lib/php/UNL/DWT/Exception.php

lib/php/UNL/DWT/Generator.php

lib/php/UNL/DWT/Region.php

lib/php/UNL/DWT/Scanner.php

lib/php/UNL/DWT/createTemplates.php

lib/php/UNL/Templates.php

lib/php/UNL/Templates/CachingService.php

lib/php/UNL/Templates/CachingService/CacheLite.php

lib/php/UNL/Templates/CachingService/Null.php

lib/php/UNL/Templates/CachingService/UNLCacheLite.php

lib/php/UNL/Templates/Scanner.php

lib/php/UNL/Templates/Version.php

lib/php/UNL/Templates/Version2.php

lib/php/UNL/Templates/Version2/Document.php

lib/php/UNL/Templates/Version2/Fixed.php

lib/php/UNL/Templates/Version2/Liquid.php

lib/php/UNL/Templates/Version2/Popup.php

lib/php/UNL/Templates/Version2/Secure.php

lib/php/UNL/Templates/Version2/Unlaffiliate.php