Remove incorrectly positioned optional parameter:

parent:: class has a completely different signature for this method
anyway, and all client code most pass all parameters. phpdoc looks
really wrong, but don't know enough about this class to correct it.

framework/Rpc/lib/Horde/Rpc/Soap.php

@@ -128,7 +128,7 @@ function getResponse($request)
      * @return mixed  The returned result from the method
      * @throws Horde_Rpc_Exception
      */
-    public static function request($url, $method, $params = null, $soap)
+    public static function request($url, $method, $params, $soap)
     {
         try {
             return $soap->__soapCall($method, $params);