Updated GamesManagement.php

This change has been generated by a script that has detected changes in the
discovery doc of the API.

Check http://developers.google.com/discovery for more info.

Author: silvolu

src/Google/Service/GamesManagement.php

@@ -331,13 +331,12 @@ public function resetAll($optParams = array())
    * (achievements.resetAllForAllPlayers)
    *
    * @param array $optParams Optional parameters.
-   * @return Google_Service_GamesManagement_AchievementResetAllResponse
    */
   public function resetAllForAllPlayers($optParams = array())
   {
     $params = array();
     $params = array_merge($params, $optParams);
-    return $this->call('resetAllForAllPlayers', array($params), "Google_Service_GamesManagement_AchievementResetAllResponse");
+    return $this->call('resetAllForAllPlayers', array($params));
   }
   /**
    * Resets the achievement with the given ID for all players. This method is only