-(AlfrescoRequest *) removeFavoriteSite:(AlfrescoSite *)site
        completionBlock:(AlfrescoSiteCompletionBlock)completionBlock - removes the given
      site from the current user's list of favorite sites, if the request cannot be completed
      successfully an error with code 404 is returned. 
    Parameters
- (AlfrescoSite *) site
 - The site to be removed from the current user's list of favorites.
 - (AlfrescoSiteCompletionBlock) completionBlock
 - The block that is called with the updated site on completion of the operation. The block has the format typedef void (^AlfrescoSiteCompletionBlock)(AlfrescoSite *site, NSError *error).
 
Returns
(AlfrescoRequest *)
Example