Remove redundant rescue_from calls.

These are redundant because ApplicationController rescues these exceptions already.

app/controllers/user_name_change_requests_controller.rb

@@ -2,7 +2,6 @@ class UserNameChangeRequestsController < ApplicationController
   before_filter :member_only, :only => [:index, :show]
   before_filter :gold_only, :only => [:new, :create]
   before_filter :admin_only, :only => [:approve, :reject]
-  rescue_from User::PrivilegeError, :with => :access_denied
   respond_to :html, :json, :xml
 
   def new