Remove retail mode.

ash/ash_strings.grd

 <?xml version="1.0" encoding="UTF-8"?>
 
 <!--
 This file contains the strings for ash.
 -->
 
 <grit base_dir="." latest_public_release="0" current_release="1"
       source_lang_id="en" enc_check="möl">
   <outputs>
     <output filename="grit/ash_strings.h" type="rc_header">
@@ skipping 208 matching lines @@
       </message>
       <message name="IDS_ASH_STATUS_TRAY_SIGN_OUT_ALL" desc="The label used for the button in the status tray to sign out all users of the system.">
         Sign out all
       </message>
       <message name="IDS_ASH_STATUS_TRAY_GUEST_LABEL" desc="The label used in the system tray's user card to indicate that the current session is a guest session.">
         Guest
       </message>
       <message name="IDS_ASH_STATUS_TRAY_EXIT_GUEST" desc="The label used for the button in the status tray to terminate a guest session.">
         Exit guest
       </message>
-      <message name="IDS_ASH_STATUS_TRAY_KIOSK_LABEL" desc="The label used in the system tray's user card to indicate that the current session is running in demo mode.">
-        Demo mode
-      </message>
-      <message name="IDS_ASH_STATUS_TRAY_EXIT_KIOSK" desc="The label used for the button in the status tray to terminate a session kiosk mode.">
-        Exit session
-      </message>
       <message name="IDS_ASH_STATUS_TRAY_EXIT_PUBLIC" desc="The label used for the button in the status tray to terminate a public account session. If the label is long, indicate where it may be broken into two lines by inserting \n instead of a whitespace.">
         Exit session
       </message>
       <message name="IDS_ASH_STATUS_TRAY_PUBLIC_LABEL" desc="Text of the the ash system bubble's user card when the current session is a public account session.">
         <ph name="DISPLAY_NAME">$1<ex>Internet kiosk</ex></ph> is a public session managed by <ph name="DOMAIN">$2<ex>yourdomain.com</ex></ph>
       </message>
       <message name="IDS_ASH_STATUS_TRAY_LOCK" desc="The label used for the button in the status tray to lock the screen.">
         Lock
       </message>
       <message name="IDS_ASH_STATUS_TRAY_SIGN_IN_ANOTHER_ACCOUNT" desc="The string for the button which lets the user add another account to the current session.">
@@ skipping 176 matching lines @@
 
       <!-- ChromeOS-specific strings -->
       <if expr="chromeos">
         <part file="ash_chromeos_strings.grdp" />
       </if>
 
     </messages>
   </release>
 </grit>