diff --git a/lib/ldap_login/login.rb b/lib/ldap_login/login.rb
index ca975f2..f902a82 100644
--- a/lib/ldap_login/login.rb
+++ b/lib/ldap_login/login.rb
@@ -2,7 +2,6 @@ module LdapLogin::Login
   LDAP_ADSERVER="https://ap99.mdu.edu.tw/MduDB/api/Auth/token/1"
   AppKey = "YhoRop0YmL6"
   def ldap_login_auth(user,request,session,flash,params)
-    ldap_hosts = LDAP_ADSERVER.shuffle
     error = ''
     ldap_user = params[:user_name]
     ldap_pass = params[:password]