Remove out of date comment

Decided not to reset the default on the basis that it may change again,
and people will be best served by referring to the config for the
default.

Author: Ian Barber

src/Google/Client.php

@@ -261,7 +261,7 @@ public function setState($state)
 
   /**
    * @param string $accessType Possible values for access_type include:
-   *  {@code "offline"} to request offline access from the user. (This is the default value)
+   *  {@code "offline"} to request offline access from the user.
    *  {@code "online"} to request online access from the user.
    */
   public function setAccessType($accessType)